Since we are not restricted to sportsbooks that accept bitcoin, I must say I really like Betfair, simply because it's the biggest bet exchange out there, and it gives me more options than just to make straight bets. If we go to sites that accept bitcoin as well, then I will probably go to bitcoinrush right now, because it has great odds, although the site does't look that good and it needs improvement. I'm missing sites with good promos now. I really loved those betting competitions (directbet and then betking), but there is nothing like that again, which is sad.