Thanks for the great tips.

I tried a feral spec. Even though I have crappy feral gear and barely know how play feral yet, it was a lot easier to pull mobs than with the Boomkin. I'm amazed by how much easier it is. I'm looking forward to getting better gear and developing the skills so I can pull larger mobs.

I went with a bear because I have crappy gear and don't know how to play this spec yet. Once I get those things sorted out I'll try the cat.