LOL I guess it depends...characters from literary/fictional works tend to have their lives singularly defined by the challenge/plot of the story, but most humans aren't nearly as exciting and have much more multi-faceted lives no? :p
So I suppose it depends on how we are identifying ourselves (at the moment) when we identify with a literary character? ^^
In that case, I think...
In terms of outlook on love: Mike (Jon Favreau) from "Swingers"
In terms of the human condition: Maya Ibuki from "Evangelion" LOL :p
In terms of sticking to one's personal convictions in the face of anything: LOL maybe Dirty Harry or any other more-realistic cinematic cop