Hot damn fire mages are fun!
I recently decided that I'm bored of my shadow priest and that although I love my mutilate rogue, I just wanted something different to toy with outside of heroics and raiding and the odd bit of PVP. I almost went with a demonology warlock. My first toon ever, six years ago, was a human warlock and he was great fun. Lost that account (long story) and although I levelled a few 'locks to mid 40s and one even to 60ish, I just never got that thrill back. I'd also tried numerous times to level a mage and just found them god-awfully dull or piss-weak. Mobs and quests that my rogues/warlocks/warriors/hunters/shamans/priests were getting through easily, the mage was struggling.
And then Cataclysm came along.
Once I hit 10th-level and got Impact specced, I was hooked. Mutilate, to me, is very calculated and rhythmic. It has a very smooth flow to it that is predictable and controllable. There's no surprises with the spec. And I like that. There's a certain level of zen you can attain with such momentum. But fire-mages are the total opposite. It's like, one minute you're doing your rotation and the next, everything is CRAZY! BOOM! BOOM! BANG! And then back to calm
I honestly don't care if it's good or bad DPS or if it's great or poor for PVP. It's just a really fun spec to play