Teaching art is just about the best gig in the world as far as I'm concerned. Just be prepared to have to deal with attitudes. Those are about all that can ruin your day. One thing to consider is what age level of student you want to work with. I work at the middle school level so the hormones permeate the very air, but for the most part the kids are tolerable and I've met some few kids with suprisingly mature drawing skills.
As Lord Cardigan said to the Light Brigade, "Just canter down the valley toward Balaklava, fellows. Nothing to worry about." -W.E.B. Griffin