At SF, I focus primarily on ATH and DEF and SPD and REB after that. After that, as long as he isn't a liability (doesn't have to be good) in any other area, then he's a quality SF in my eyes.
At PF, I also focus primarily on ATH and DEF (you'll notice I do this at pretty much every position), and place a greater emphasis on REB and LP and less emphasis on PER, BH, and P.