Lenneth Valkyrie from Valkyrie Profile. What bugs me is that she wants it both ways. She pretends to be this powerful, uber bad ass woman that only care about her job and nothing else. Then later on, when she remember that who she was before she became a valkyrie, she goes all hysterical crying girl. I know that I was supposed to feel for her, but I got pissed off at her when I was playing that game.
Tidus did not leave much of an impression on me. I could also say the same about most Final Fantasy main characters. Except Cecil, he was the sh-t. They almost seemed interchangeable. The only main characters that I kind of liked were Terra, Celes, Locke, Tifa, Rinoa, Garnet/Dagger, Yuna, and Balthier. They were just as bland as the respective main characters, but they managed to leave an impression on me.
Right now, I am playing Viking: Battle for Asgard and Skarin is not leaving much of an impression on me. The world around him is a lot more interesting than that over developed football hooligan. I could also say the same thing about all the main characters that got inspiration from 90's comic books. When playing these characters, I kept thinking, "good lord, even the Punisher showed emotions every once in a while."