Depends. Pyramiding,drop sets,super sets, 5x5. Depends if I am training for strength and bulk or shedding fat. I do not train the same on as off. I push much harder on. Might be mental though.
While bulking I generally stay at 3-4 sets of the heaviest weights I can for 3-4 reps. depending on the lift. I do this for no longer than 6 weeks and switch to drops or pyramiding or supers.
I hope you're not speeding thru your reps like running a marathon. 30sets is too much, I dont see how anyone can do it unless they're not using enough weight.