I don't rotate my tires (although it may happen when I switch from summer to winter tires), and I prefer oversteer to understeer - just means I can steer with my right foot.
Preferring understeer is for the people that get excited by cupholders, gps, bluetooth, and cars that can park themselves. My car has none of those things.
I always put the new tires on the front. I figure more tread on the wheels that displace water / snow will keep stopping distances down. When I kill the rear tires, the fronts move to the back, and new ones go on the front.
Regular rally-x, ice racing, and the occasional auto-x makes understeer annoying. I honestly have difficulty understanding how anyone can prefer cars that ignore instructions (by the way, I drive an e30).
As for deer avoidance, I have two techniques:
1 - I see them in advance: I downshift and aim the car at them. they get scared and run away (sounds dumb, but when 3000lbs of steel starts growling and snarling, then charges at you, the headlight stupor seems to fade rather quickly).
2 - I don't see them until they're too close for comfort: I bury the brake pedal. I've broken a set of lines this way, but the only casualty was the lines themselves.