I'd hate to see you leave as well man. Your a wonderful artist, and your attitude towards the site and the weekly contest is one many here should aspire to.
It's true that you just don't know what to expect when you put work up here, even for those that try to do stuff that are like shirts that typically win. It's always a gamble.
I've been using the weekly contest as a way to keep me drawing and motivated with artwork, so even if it goes nowhere, I gave it a shot, and was artistically active for the week. Otherwise, I would just play video games.
Again, I would hate to not be able to see your artwork each week, but as long as you keep at it somewhere else, it's good. Just know man, you will be missed around here.