Was going to make this a couple of days ago, but now works as a neat counterpoint to Alex's thread.
I'm talking two things here: 1. Your opinion of them has shifted since they were around and you think it would ruin some amazing memories 2. They reuniting and playing shows would permanently damage your opinion of them and their *integrity*
So not just listing bands you hate who you never would've seen the first time round.
For me, it's LCD Soundsystem. I know they've not been gone long, but their final tours et al were brilliant and a bit emotional. After all Murphy's chat about quitting too if they ever came back it would make it all seem real fucking hollow