@MRain i can understand your point, but stories like jojo, whatever they are, are read from the beginning.
phantom blood may be boring, or heavy to some people, but it's the beginning of jojo. all the parts are connected to it somehow, especially battle tendency!
if i watched part 2 first, a lot of things wouldn't have made any sense, starting by the characters and ending by the skills. what about erina, speedwagon and straizo? they are characters from phantom blood! even lisa lisa, she's the baby that erina rescued! the stone mask? hamon? all the things in battle tendency are somehow connected to phantom blood, and it's the same for the rest of parts. phantom blood doesn't go first for nothing.
@soyblast makes a good point. it's after battle tendency that the series got a big series of changes. stands are introduced, by example.
also, if i really really really wanna start watching/reading jojo, it costs me nothing to start from the beginning.