Technically "Indie" is totally independently produced music...like somebody self-releasing their album. There are Indie labels that don't have the major distribution of the majors and this is considered "Indie" as well. Most bands on these labels (Rough Trade, Kill Rock Stars, etc...) share certain aesthetic qualities that have been labeled "Indie." So when one of these types of bands...say The Decemberists jumps to a major label (Capitol) they are still considered Indie even though they really aren't at that point. On a major label, many indie bands retain their original sound so they are still labeled as Indie.
Therefore some people argue that Indie really isn't a genre of music. I think it is because there is a certain niche/sub-culture/style associated with the overall "Indie scene." It's a big thing and it exists so we might as well acknowledge it!
And yes, I am a huuuuuuge fan of so-called Indie music (as if that wasn't obvious

)
Animal Collective is pretty much my favorite modern band. Actually, I saw them at an amazing concert in Oxford, Mississippi a month ago. It was cooooool.
I am a fan of pretty much all the bands previously listed except:
1. M. Ward (I have not heard them)
2. Saves the Day (have not heard them)
3. Jets to Brazil (have not heard them)
4. Iron and Wine (do not like to listen to them/him at extended intervals...too mellow in a too sweet way)
5. Imogen Heap (I really don't like the soft electronica thing)
6. Death Cab For Cutie (Ben Gibbard's voice can become a little grating in its un-ending cute overload).
I need to listen to more Minus the Bear.
Here's a question:
How and when and why did you get into this sort of music? I mean...when did you discover there was a world of music outside the mainstream and what did it mean to you?