Getting bored of world of warcraft.?

I'm an avid World of Warcraft player but recently have been getting bored lately with the game. I've tried taking longer breaks from it like months, (I usually play few times a week), and when i came back i still feel burnt out. I really enjoyed the game when i was leveling my first character. A troll rogue whom is now 70. I'm open to ideas of new cles and why i should play them. I play on a PvE realm so i'm also open for reasons to play on a PvP or RP realm as well. Thanks in advance for the advice.