just my two cents... I've heard that having a manual with a plow is PITA, because you're trying to shift and control the plow at the same time. I've never done it, so I can't say for sure. I'm sure people do it and get used to it. I have a manual and love it, and would never want an automatic, but I don't plow. If I did plow, I would probably want an automatic.
Drive it like you rented it, not like you stole it. Cus if you stole it, you'd be driving 5 mph below the speed limit and using your turn signals.