[I can definitely understand this feeling. I hardly get any comments on my own art, though I get a few faves.]
I know what that feels like when there are no comments given on fanfics or pics too. Faves are a little something, but yeah, not as good as reviews.
I can actually say the same for my *cough* art as well. When I look at the works of others that appear to be of higher quality and interest than mine, I just become full of unbridled rage. I almost always ask myself 'what the hell am I doing wrong that they aren't doing?'