I enjoy playing on carbon out of the ones that you listed the most. It probably has to do with the animations and graphics, i get a kick outta that. I play Full Tilt a lot though also. Full Tilt has some cool stuff. The poker academy and pro challenges are kinda interesting. They offer good bonuses too. If I am gonna play a freeroll bodog is the most worth while by far because the prize pool is the largest of any online freeroll tournaments that I have been able to find. Really when it comes down to it though I will play on any site lol.