"Everything on-rails sucks"
I normally agree with what Malstrom says when he's not intoxicated and strongly disagree when he's ranting, but if he said that about on-rails, I agree even if he was under LSD or crack.
Edit: obviously for "on-rails" I mean something worse than just a linear main quest, if we talk about RPG's or action-adventures, "on-rails" is when the thing is so tight that you feel it.