I'm still new to the world of AAS, but one thing I've heard from some vets (guys who take this shit very seriously - not "this guy at the gym who is pretty big") is that they generally prefer the longer esters because it gives them more time to make a difference with their diet and hard work. Prop esters act quick and give a big bang, but you only get about 8 weeks of a cycle to maximize the benefit of it. That's great for someone looking for a quick result/change. By using a longer ester that allows for a longer cycle, you get more time to maximize the benefit of your hard work in the gym and the kitchen.
Not sure if any here agree, but I can see how that might be true for the really dedicated out there.