I agree with Michaelson and Min. Everyone ends up finding their niche. I originally started on Smackjeeves and I posted everywhere else (comic fury, inkblazers, etc), and didn't have a lick of luck. Then for some reason I just had better luck here on Tapastic which is the primary reason why it's now my main hub (I rarely post elsewhere anymore). I know some users here on Tapastic actually got better results elsewhere like Comic Fury. But most success stories I've heard from those who did not get the magical popularity wave, mostly achieved it through communication with the community (forums, other members, etc) no matter what website they found success on.