Girl gamers like the same games as men.

[SvennoJ]

And what games do boy gamers like?

There are definitely differences in what games my wife and I like. Nothing to do with hardcore or casual. Everquest is about the most hardcore game I've ever played, and that's where I first met her.
Nowadays she mostly plays on Facebook with her friends, while I'm more into single player games. I played Frontierville too for a while but lost interest. We both like co-op in for example LBP and Mario, not shooters. Portal 2 didn't work out either.

So yes there are differences but we both like hardcore and casual games.