For tracks that are included in the last track, such as Nirvana's Nevermind which ends with "Endless, Nameless", I leave it in. Most of these MP3's will be listened to on my computer as well, and I want them to be played like they would on the album.

The hidden tracks that I hate are the ones that are seperated by a number of blank tracks. Some cases they're odd, but forgiveable. Rob Zombie has an album I think where there's about 10 of these tracks, but each is about 5 seconds long and has some extremely quiet noise going on in the background. That's at least a little interesting. Dave Matthews Band, on the other hand, is annoying. I think it's on Under the Table and Dreaming where they have about 20 tracks that are each about ZERO seconds long. That's annoying and pointless.

But then there's the album that you dislike, Bitt. At the end of Queens of the the Stone Age's new album Songs for the Deaf, there's a song that is listed on the back of the CD cover as "Mosquito Song (Hidden Track)". I found that pretty funny

As for those data CDs, the problem I always had with them was that the last song on an album wouldn't get ripped. Audiocatalyst at least wouldn't rip the data track, but would have trouble with the last song. I havn'e ripped any albums like that on EAC yet. How does it handle it?