It's really difficult to pick just one, but I would say... Mario. Since I was little, it's the character I've always considered the epitome of videogames. Moreover, I've always wished I could look like princess Peach, so pretty and elegant and blonde...

Tie between Roxas and Axel, maybe Axel winning by a bit. Both from Kingdom Hearts, obviously

It's hard to choose favorite characters, but I definitely give my first votes for Garrus "Archangel" Vakarian and Urdnot Wrex (though I like almost every character in Mass Effect series lol, even not main or even not from Normandy, it was really amazing game, hate EA for ruin it).