a) Pat Harrison - The man changed my perspective of the online gaming industry. Some people do care, and he's one of them.
b) Customer Support - The best in the industry IMHO. Trident Lounge is also quite good, ditto Bet365 and RoxyPalace (and a few others). But I still find this operation offers the best customer support.
c) Fast payouts - Sure there are others who offer instant, but getting my money back (generally) inside of 24-hours w/flushing option is great. You'll never lose sleep as to whether or not you'll get your winnings.
d) Club Rouge - Okay, you got to get in first, but this is THE best club around. I suppose the Crypto's come close as far as offering monthly match bonuses. But the comps for Club Rouge members are also quite good.
e) Ed Ware - I don't deal with Ed Ware, but from all that I know about him, he's one helluva leader. I see this outfit as always striving to gain the players respect (great approach), and eager to constantly try to improve. No casino will ever be perfect, but this is as close to perfect as you're going to see in the now of the online gaming industry.
f) No "Wizard of Oz" hiding behind a curtain - You can even see their pictures/profiles posted on their website. The best we could see before that for all casinos (as far as I know) was a computerized Ryan Hartley. How times change...
g) If I had to use my money to invest in an online casino, this would be the one.