[jongraehl]

It's not that teaching is better for society than whatever you do (is it? how would we really know?) - it's that you get immediate "helping someone out" feedback all the time. It must be gratifying on that level (aside from the fact that it's hard to actually reach anyone who feels compelled to "do time" in your classroom). If you feel like you're missing that "good person" feeling, I'm sure you can figure out ways to get it.