My opinion? Blizz has ruined raids (no progression, no skill, ect.) so what's left? PvP! Seriosuly, PvP is the only reason my account is still active. Go do some BGs, get an arena partner or 4 (IRL friends if possible, it's always more fun with them) and have some fun!
If WoW has just REALLY gotten boring for you, then do what I did, switch to another game!
When I quit, me and a few of my friends started playing DDO (Dungeons & Dragons Online). Sure, it sounds lame, but the PvE in it is really great. You can have fun and test your MMO skills at any level, and the PvE is more skill based, less mindless grinding. The great thing is, it's free :)!
You could also try EQ2, Warhammer, AOC, and many more.