hmmm, I myself and my brother both play LOL now as well as alot of our friends that left RS with us when it turned to crap, It's great fun and IMO is only getting better as they refine the game, It's still only about 2 years old including it's BETA phase so it's got a lot of growing room.
How about DDO? (dungeons and dragons online), IMO its better than LOTRO (lord of the rings online), the people are nicer, there is a load of f2p content so you don't have to pay and still have fun, but if you do want to pay you can always buy a few adventures at a time for a few bucks instead of doing the monthly subscription if you are more of a casual player like me.