I have only played on bovada, black chip poker and carbon poker...so I'll just rate those in my preferences. Bovada is the best for MTT's and I've heard many people agree with that statement. They have more big tables throughout the day than the other sites. Black Chip Poker has a cheap $10 freeroll about every hour. It's not like you'll make much money, but good for entertainment if you want to kill some time but not be glued to the computer(you can walk away and not worry about your losses). Then the Carbon poker is running a 1k freeroll every day in February. I like the gameplay a lot more on carbon than I do on the other sites...just from how you can interact with the other players and bcp doesn't provide %'s of your hand when all in. all in all, I play more on bcp than I do the others. Bovada is probably still number one, I just don't have as big of a bank roll on that site.