I enjoy Th13teen but only because as a theme park enthusiast I'm not capable of hating any ride (perhaps with the exception of The Simpsons at Universal Studios), but I still see its as being a bit "meh" and pointless. It's very good fun in the dark at Scarefest or Fireworks though.
However, my main gripes with the facts still stand and that is that it still has no story, meaning or purpose to it... it still has blue fake ivy everywhere... the tesla coil is still rarely if ever working... and my non enthusiast friends still ask me if the ride is unfinished - although now that has morphed into "are they working on/repairing the ride" - due to the scaffolding etc.
I'll agree with you regarding The Simpsons. What an absolute waste of space. It's the only ride I've ever been on (and previously BTTF) that made me feel physically sick.
Oh, and TH13TEEN -
A huge let down and anti-climax. No solid story that the GP understands, cattle pen queue line is horrid, first drop has trim breaks, outdoor section is boring and short, scaffolding still confuses the GP.... It's ONLY saving grace is that the crypt is pretty darn cool and unique, effective and rememberable.
It's not a thrilling coaster at all. It's not a world beater. It's going to win any awards. But am I a fan? Yes. Even though I can point out it's flaws, it's still a very good theme park ride and fits in well with Alton Towers. It's always worth queueing up for and it's still enjoyable.