Hmm... Recently (and maybe usually too) maybe something like 40-50%. When I actually have time, that is. For a while now all my gaming has pretty much been short breaks between reading so I've just been playing some short attention-span requiring games. But then again, often I also have times when I play nothing but AGs for a long time...
Aside from AGs, I guess I do still play quite a lot of adventurish games though. A few interesting RPGs (KotORs, Jade Empire, Elder Scrolls), a couple more or less platformer(ish) games like Assassin's Creed, Tomb Raider, Mirror's Edge... And I guess I look for games with some sort of innovation.
So mainly story-driven, adventurish stuff even then