Meow... I like the blockings done in Ninpo because they really hurt... XD Its more like hitting the opponent's arm than blocking imho... xP
Anyways, I can't say I prefer any of them as each of them complement each other. Sometimes you have to use punches, sometimse shuto, sometimes elbows, kicks etc... It all depends from the situation, you might prefer one or the other but its important to adapt to certain situations and be able to use all of them instinctively, whichever is more appropriate... ^_^