here's one thing i never really understood:
why, instead of doing 3-4 different exercises, don't you just do more sets of one exercise? do people really believe in the "hitting different angles" thing? i mean, maybe okay i can see your point for flat bench and incline bench... but why do anything more than that? and for biceps, triceps, etc?
there are people with huge adductors who only ever do regular squats... sheds some suspicion on the "different angles" theory.
these days i do no more than 2 exercises per body part, where i used to do sometimes as many as 5 for each. no difference in physique.