Joined: May '08
Age: 54 (M)
If you don't like Stars, the rooms with the most players are 888, Party or one of the biggies out of the iPoker network, like Titan. All solid rooms with a large enough player base, at least at Hold'em.
Joined: Mar '11
Age: 50 (M)
As you already play on Stars, what about Fulltilt ? Further 888 is for sure an option which good traffic and Party Poker or Bwin (same network) too. I also like PKR, but its not that good for multitabling. Don´t know Ipoker rooms...