When I look up a game, I find it by its name. I don't think I've just scanned through the "RPG section" or the "1st Person Shooter" section of a store since the brick & mortar days. Steam has a nice set of categories and subcategories all set up, which I never use. I might use tags to try and find things relevant to topics on forums or to keep certain types of games out of my store listings, but I've never used them to look for interesting games.
How about you folks?
How about you folks?