So, some that haven't been mentioned:
= Compilation live albums, with fade outs between each song. Exit..Stage Left, AC/DC Live, and Seconds Out fit this bill (though I actually LOVE Seconds Out). I usually use my Mac and fade them together for listening on my iPod (I do this with the "hidden songs" too; edit them out and list them on the albums they're on). This is why I love the Dead: FULL SHOWS, warts and all. And if there's time on the disk, add some songs from other shows that weren't played at every gig.
= When bands re-release albums with bonus tracks and DON'T RELEASE ALL THE B-SIDES. Ozzy did this with Blizzard, and Phil Collins just did this with his re-issues. Put it out there. I get that not everyone is a completest like me, but at least make it somewhat available. Kudos to Sabbath and U2 for doing this. Maiden too.
= I think they're called "drops" (where the music fades to a drum beat, then all the treble is taken out of it, and it sort of fades out then back in). Annoying.
= Live songs/albums that don't state where they were recorded, or worse, misstate them. Nothing worse than seeing on the album "Live in New York!" and hearing the singer say "We love you, San An-TONE!" Priest is shitty for this (on their remasters, the live tracks invariably had "recorded somewhere on one of our many world tours!" Oh really? I thought it was done in Rob's sex room. It turned out that something like all but one were from the same show, just cut into pieces for the reissues. LAME-O.
= Singers that "won't sing the other guy's songs". This is why I love Bruce Dickinson. He sings Di'Anno, he sings his shit, he even sings the songs of the guy that replaced him. Doesn't care. Does what he has to do. Cherone in Van Halen, same thing. Brian Johnson (he's even said, he wants to sing MORE Bon stuff). Joe Lynn Turner; that guy, in Rainbow, in any given setlist was singing his own stuff, Ian Gillan, Dave Coverdale, Ronnie Dio, and Graham Bonnet, and singing it like a CHAMP. That's a pro move. Sammy Hagar? C'mon dude. Sing the Dave stuff. You know you can, so it's not that. The only exception to this rule: Ozzy, because he can't (plus I'd much rather hear the Ozzy stuff anyway).
= Repeat thing, but fades. The fade in "Tonight" by Ozzy is a crime against humanity. Randy is just kicking his outro solo into high gear, and pffft. Fade. Lame. An early press sheet for the remaster and reissue of Diary had a "Tonight (Extended Version)" on there, and Bob Daisley has said he has a copy that isn't faded, but to date, it has not been released. That is one of my musical holy grails. That, and the alleged "Cinema" suite by the Rabin-era Yes.