I prefer the fast payout site like Nitrogen, has no trouble to wait for 10 minutes withdrawal, much better than 2-24 hour withdrawal here.
It all depends upon your individual preference and even i do prefer gambling sites which has instant withdrawals rather than waiting it out because in the bitcoin world delay mean you can lose your money and so for sports i use directbet which i think is the best book without any fuss as you get your coins back once the match is over.
Interms of gambling with at ease i would prefer also those gambling sites who has an instant withdrawal feature and i wouldn't doubt that if cloudbet really implements that surely they can minimize the problem who's still occuring for now. And I can say on the other hand that cloudbet got a huge coverage truly interms in game selection but im doubting to cameback here since i can't afford to get some problem when the time the error of withdrawals will occur to me.