I often go to BC.game, Gamdom and CSGOFast. First of all, they offer a good selection of games, adequate odds and impressive bonuses. On Gamdom, for example, I've found cool roulette and craps, which always adds to the excitement. BC.game impressed me with the variety of games, and CSGOFast has become my favorite site because of its fair games and welcome bonuses.
When choosing a site, pay attention to its reputation, license, player reviews and transparent rules. Look also at the availability of a variety of games and bonus programs. I always advise paying attention to details.
If interested, neustadt-ticker.de has an article detailing
cs:go gamble sites with which I had experience. It might help with your choice.