If: My opponent is not close to where I've decided to hit the ball, passing shot.
My opponent is in the way, or I'm rushed and need to make up some time, lob.
I also like to throw in a very hard slice if my opponent is really close to the net and I can't pass him. Seeing hard baseliners come inside and hit into the net puts a smile on my face every time.
PS85, 367g/345sw, Pacific classic@58