I'm not an artist, and I'm not going to pretend to be, but I love deviantART for it's ability to showcase the amazing work others are capable of. As part of running my blog, I've showcased quite a few pieces composed by people from this site. I may not be able to offer them art trades or any real meaningful thanks, but at least through this account I can show them some measure of appreciation.
It's also a bit of shameless self-promotion, lets be honest.