I used to turn my shoulders pretty level, which a lot of golfers think is correct. But that made my swing too shallow coming into impact, so my contact was picky, especially off the turf.
I'm John McEnroe-like. I'm coming forward every opportunity I get. My wingspan covers some ground at the net. My serve is OK. I can move it around enough. My groundstrokes are good enough to hang in a rally with a good player. But generally, my goal is to put away a point quickly.