So here's the thing. I "beat" Fez, which didn't feel like a conclusion or victory at all. In new game +, even with the aid of FAQs to try and figure out the Tetris code the input isn't working. Reading that the last puzzles get harder and harder, I feel like I shouldn't continue at all, which means I'm not getting the real ending. So although I enjoyed playing the game up through the seizure, I mean "ending", I feel really very unsatisfied right now.
Unlocking the Real Ending after you've beaten a game with some form of replay or trickery involved has never felt right to me, almost like a punishment.