One pin here, always have, always will. I've heard the horror stories of people getting confused about which pins to use during a case of buck fever and I just started out using one. (been shooting for 15 years now) It cuts down on the excuses if I do miss.
I shoot a 75lb, 28" mathews Sq2 and it shoots flat from 10-30yds. If longer shots are presented I just compensate.

I don't know about you guys but, 30yds. when your up in a tree seems like a mile to me.