Yeah I have mine set about half way or so (most likely because my vision isn't equal between my two eyes, so it's a bit of a strain to do 3-D to the max). 3D doesn't matter in some games, where it feels like an afterthought (only the dialogue menus give a 3D affect, for instance) while other games make it look really nice.
3D in games is still kinda like how 3D is in movies - sometimes awful, sometimes kinda neat.