I think that Dominate effects should be highly restricted, while Charm effects are perfectly OK (though I am saddened by the lack of effects that do the opposite of Charm effects... you know, turning a crowd against a guy, or whatevs.)
Then again, one of my favorite tricks is "I need concentration? Alright, I Dominate myself." But then again, I seem to have a rather odd way of looking at how the mind works...