Well you see I don't necessarily hate them, I guess it really depends on the band. Some can pull it off and others fail. I can listen to most Opeth stuff. But then there are other bands I listen to (especially doom metal) that have very long songs that seem to drag out and seem a bit unnecessary to me.
Fair enough.
I can agree some lengthy tracks are overdoing it and could be shorter. I think doing a 10 minute plus epic has a big risk involved. It is why prog bands are much better at doing songs in this style because its more time to be able to let the song flow nicely. Agalloch, Opeth, Anathema are three specific bands I absolutely enjoy because of their diversity.