With all the current problems facing the online poker industry, I would suggest that you stick to the more established sites that have larger player pools and a solid record of secure, reliable, and fast cashouts. I was going to recommend Pokerstars
and Party Poker but I see that you are already playing on Pokerstars. Have you had any success on building a bankroll on Stars?
Before you sign up for a new site, I would suggest that you download the software and just observe the games that may be of interest to you. If you like what you see, then search for the best affiliate deal available for that particular site and sign up through that affiliate.