To me much of that depends on the level you're at the off/def sets you play. The aejones how to win at D2/D3 covers it pretty well, that was pretty much how I tried to build my teams.
To me, assuming D3, I'd like all to be 50/50 Ath and Def. Ath less important in PG and SG, vastly more important for PF and C. A "pure" PG should be wind up 60+ Pass and BH and ideally 60+ Speed. SG I want 60+ Spd and BH plus hopefully High/High Per that can wind up 70+. If not much Per then high FT, speed and BH.
PF and C to me are the same, although I usually have a little more Spd at PF. 50+ Ath, 70+ Reb, LP is a plus.
So for me:
PG - SPD, DEF, PAS, BH
SG - SPD, DEF, PER, BH (or LP/FT)
PF/C - ATH, REB, DEF, LP