From the anime RahXephon, Ayato Kamina starts off as a typical student and artist living with his mother in Tokyo. One day he is taken from Tokyo by Haruka (An officer within the TERRA organization) and the RahXephon because he has a birthmark resembling runes, which are revealed to be a sign of his being a potential instrumentalist for the RahXephon.
Why I like him: He was always willing to go the limit when he needed to. He has great courage even if he wasn't sure what was going on all the time. For being randomly tossed into the situation he was he held it together very well. Shinmaru wrote a fun Diary of an Anime Lived post on Ayato Kamina's character that I think people should check out as it'll make you look at his character a little differently even more.
Why I hate him: He was painfully awkward at times while totally understandable sometimes irritating because it was done a lot.
Overall: If you like characters that are thrown into a random "world" not knowing what they should completely do Ayato shines on as one of the best characters I've seen in this situation. If you have already seen the show I urge you to watch it again as I will be doing soon enough. It one of those shows that watching only once just won't cut it.