prez - I would say in half the cases, my best player plays PG. I do not differentiate between offense type when making that decision.
Here is how I do it, I pick my PG first. If I feel my 3rd best guy can do it, I will play him, if it takes my best guy, he will do it. I have a team right now that my best PG is starting at PF, first time I have ever tried that - makes for great fun IMO.
Where does that 'feel' come from, same place as everyone else gets it, IQ, sp, ath, bh, pa, stam, per, def, etc, etc, etc? Most my teams Icould not even tell you if I run flex or motion or triangle, it plays zero role in my choices.