Since I am a pretty bad fighter pilot, I tend to use manuevers that border on stupidity and/or genius.
The negative G outside roll is a good move, as it forces your enemy to red-out if they're going fast enough or to miss. My other favoriate move is to slow down, get to about 200mph and lure them into a slow scissors or stall-fight. Negative G's are a great way to have your opponent miss as well as make other enemies miss when they're zooming up on you or slowed down enough.
A valid tactic if used correctly, if not, you're just a fat, easy target.
