A friend of mine tried to get me into it. As a general rule, the first thing I ask when someone tries to get me to follow a series is how many episodes it currently has. If I'd need to spend something like 50+++ hours to get caught up to the current episodes, or just don't ever see a series having an actual ending (I like closure, what can I say?), I don't bother.
That said, One Piece is up to something like 400 episodes. I just don't have that kind of time anymore.