I think that there should be a new game category for games that actually have meaning, and that make you think. Games that would be in this category are: The Company of Myself Endeavor Loved Don't Look Back (it's on Kongregate) The Majesty of Color K.O.L.M and maybe: Every Day The Same Dream The Illusionist's Dream
I don't know about a category, but tags would work well. And, as far as I know, there is some discussion about letting users tag games in AG3, which would be a great feature if/when it's implemented.