I left on my own terms, I did not want to give them the satisfaction of getting rid of me on theirs. I am happy now and I have zero regrets. The only time I look back in fondness is when I think about my old coworkers. Other than that, I don't look back. If there are those who are undecided and afraid of what's waiting for them on the other side, don't be. It truly does get better.
Absence makes the heart grow fonder. Don't ever forget the steaming pile that is Marathon Oil. That stink is hard to get off.