SiriusismyCrony's Random Rambling on Lily Evans/Potter
I personally see her as someone that people could come to if they needed help, or just needed to talk. She doesn't easily forget things and once you've upset her she might "forgive" you on the outside but not completely forgive you on the inside (possibly why she doesn't seem to like her sister all that much either?).
She is willing to stand up for what she believes and doesn't often cry or show her deeper emotions in public. Such as who she likes, or when she is really hurting or upset. I imagine she would probably show when she's really happy or angry... as well as other emotions.
I think that she would be very good at charms (as other people have said) because why else would JK have mentioned her wand in that sense? Her other good subjects would obviously be Potions and most likely Muggle Studies (I'm sorry, can't recall the class name at the moment) because of her background, and she was probably interested in Transfiguration. I think that there have to be a few subjects she'd resent, so she wouldn't be good at them. She might have been bored when in History of Magic, possibly because she felt she already knew everything the teacher had to say?
I do think that she, like most every other girl, went through a time in her life where she was really interested in the idea of dating and romance. Yet, she didn't want to admit it because her friends/peers all liked the same boys she did.