What's a roadblock? it's a point in most MMOs (usualy there are more then one of these points in an MMO but one major one) where you cannot progress any further because you either
A. need alot of organizing to do so (needing a group of certain classes on at a certain time so you can goto a dungeon that's the only decent exp at your level).
B.needing vast amounts of in game currency to progress.
C.Other factor depending on the game.
if you decide to progress without accomplishing what's blocking you it's going to be painfully slow.
so here are some of my stuck points in various MMOs
Just to clarify. Road Blocks are not points that you cannot progress beyond but points that slow your progress to a hault.
So share some of yours !