I don't ever remember Bioware being "light hearted." They've always consistently had humor in their games, but were never afraid to go dark. But there is a world of difference between, say, Imoen trying to deal with her torture at the hands of Jon Irenicus in Baldur's Gate 2 (an interesting and important part of the story, which happens to be dark), and crazy and constant pools of blood and blood spurts and graphic of a guy hanging from a homemade noose and so on and so forth in Dragon Age (largely nothing to do with the story, just gratuitous dedgyarkness). That's why the only Japanese fantasy game series I play any more is Rune Factory.