When you first get to know Rory, he may seem a bit easily intimidated and generally unsettled by odd things when they happen, especially the sort of things that tend to happen because of or around The Doctor. However, he is almost always able to overcome this intimidation, this unsettled feeling in order to do what needs to be one to help people.
One example of this might be helping Amy clear the hospital while the Doctor is attempting to save the Earth, or trying to keep a Silurian soldier alive while The Doctor attempts to free hostages. Or keeping a record of his coma patients appearing outside the hospital in order to figure out what is going on with that. We get it Rory, you're a good guy.
Rory has a general empathy for most people, it really takes a lot to get on his bad side. Like kidnapping his wife and unborn child, for instance. If he's feeling particularly compassionate, he'll even put himself in harm's way to help someone, such as when the Flesh dopple of Jennifer Lucas was in danger, or in order to stop The Silence. Because of this empathy, he's usually the first one to try to calm newcomers to the TARDIS and the Doctor's life. His compassion is what makes him such a good nurse. It can also get him in trouble. A lot of trouble. Like, dead amount of trouble.
Look, Rory has died before. Not once, not twice but a lot. He's come close to death at least nine times, and has actually died at least three times. Yet, he's almost always come back from the dead. He is, in fact, quite overconfident about that fact. It may be one of the reasons why he doesn't pay any mind to dangers posed by his compassion or his love for Amy.
And Rory does love Amy. Stubbornly so, in fact. He probably has not loved or been with anyone but Amy Pond, and his love for her has caused him to do great things. Such as sitting watch while she was contained inside the Pandorica for many years, or searching the galaxy for her when she was kidnapped by The Silence. (Though the latter, at this point in Rory's canon, has not happened yet. There are a few things in here that have not happened for him yet, but are important towards personality explanation.)
Rory is capable of great acts of bravery, having dueled with a 'vampire' in order to keep Amy safe. And really, he would do anything to keep her safe, up to and including leaping in front of aliens spitting dust that can burn away flesh and bone.
He wants to spend the rest of his life with Amy, loving her that much. Wherever, whenever. Be it in the TARDIS on constant adventures or having a peaceful little life in Upper Leadworth. He doesn't care where they spend their life, as long as he's with her. That said, he would prefer a quiet sort of life.
He has a head for science and medicine, having learned all about time travel and pocket dimensions on his own. When he and Amy were miniaturized by the Teselecta, he was the one who was able to determine that it was done with a miniaturization ray. He also managed to perform repairs on the TARDIS, as well as figure out how to ride a motorcycle with no real previous experience. Though, it's certainly possible that he acquired quite a few of these skills in the nearly 2,000 years he was an Auton and waiting for the Pandorica to re-open.
He still maintains the memories of being an Auton, having re-obtained these after Amy brought back the Doctor, but he is able to sort of segment them and shut them away like something behind a door. He has not told anyone about this, not even Amy.
Rory can be a bit humble, he does not tend to like to draw attention to himself or his accomplishments. He does not tend to even like to mention when he is unhappy or bothered by something, generally using snark or sarcasm as sort of subconscious indicators instead. When he does let people know these things, it is usually to people that he feels absolutely need to know these facts, and only when he thinks that they need to know them.
Personality Revision
One example of this might be helping Amy clear the hospital while the Doctor is attempting to save the Earth, or trying to keep a Silurian soldier alive while The Doctor attempts to free hostages. Or keeping a record of his coma patients appearing outside the hospital in order to figure out what is going on with that. We get it Rory, you're a good guy.
Rory has a general empathy for most people, it really takes a lot to get on his bad side. Like kidnapping his wife and unborn child, for instance. If he's feeling particularly compassionate, he'll even put himself in harm's way to help someone, such as when the Flesh dopple of Jennifer Lucas was in danger, or in order to stop The Silence. Because of this empathy, he's usually the first one to try to calm newcomers to the TARDIS and the Doctor's life. His compassion is what makes him such a good nurse. It can also get him in trouble. A lot of trouble. Like, dead amount of trouble.
Look, Rory has died before. Not once, not twice but a lot. He's come close to death at least nine times, and has actually died at least three times. Yet, he's almost always come back from the dead. He is, in fact, quite overconfident about that fact. It may be one of the reasons why he doesn't pay any mind to dangers posed by his compassion or his love for Amy.
And Rory does love Amy. Stubbornly so, in fact. He probably has not loved or been with anyone but Amy Pond, and his love for her has caused him to do great things. Such as sitting watch while she was contained inside the Pandorica for many years, or searching the galaxy for her when she was kidnapped by The Silence. (Though the latter, at this point in Rory's canon, has not happened yet. There are a few things in here that have not happened for him yet, but are important towards personality explanation.)
Rory is capable of great acts of bravery, having dueled with a 'vampire' in order to keep Amy safe. And really, he would do anything to keep her safe, up to and including leaping in front of aliens spitting dust that can burn away flesh and bone.
He wants to spend the rest of his life with Amy, loving her that much. Wherever, whenever. Be it in the TARDIS on constant adventures or having a peaceful little life in Upper Leadworth. He doesn't care where they spend their life, as long as he's with her. That said, he would prefer a quiet sort of life.
He has a head for science and medicine, having learned all about time travel and pocket dimensions on his own. When he and Amy were miniaturized by the Teselecta, he was the one who was able to determine that it was done with a miniaturization ray. He also managed to perform repairs on the TARDIS, as well as figure out how to ride a motorcycle with no real previous experience. Though, it's certainly possible that he acquired quite a few of these skills in the nearly 2,000 years he was an Auton and waiting for the Pandorica to re-open.
He still maintains the memories of being an Auton, having re-obtained these after Amy brought back the Doctor, but he is able to sort of segment them and shut them away like something behind a door. He has not told anyone about this, not even Amy.
Rory can be a bit humble, he does not tend to like to draw attention to himself or his accomplishments. He does not tend to even like to mention when he is unhappy or bothered by something, generally using snark or sarcasm as sort of subconscious indicators instead. When he does let people know these things, it is usually to people that he feels absolutely need to know these facts, and only when he thinks that they need to know them.