I want him to stay evil. But then again...he looked so regretful when he was listening to Hinata's speech, I think he'll turn to the good side again or at least die regretting what he did. Whether or not he's 'good' or 'evil', imo, he's a good guy. He's desperately trying to change the world, but unlike naruto, his way of doing so is extremely questionable. Plus, Obito is trying to do so by using a 'short cut' by forcing everyone to go into a fantasy where no pain exists.