The problem is, many of the indie devs lack creativity. How many indie games include a character with a castlevania whip? how many top down RPGs with geniric stories? etc.
Although, a lot of good ones do stand out (Minecraft, Super Meat Boy, 1001 Spikes, etc.), but like a lot of people in this thread are saying, for every good Indie game, we get a ton of crappy ones.