On the same token, when I search for "adventure" games, I really want to find games like Sam & Max or Monkey Island. Instead, I see a whole bunch of kids games, and at best, "find a hidden object" games. Not what I want at ALL.
http://rpg-site.com/ and http://toucharcade.com/category/games/adventure/ help, but they still miss a lot of stuff.
Edit: tried out Chomp, it doesn't help. This problem would be ridiculously easy to solve with letting users tag apps