Some do! Some don't. There is one English psychedelic outfit I like called "Ozric Tentacles". Every album is pretty much identical. And it turns out that I rea

Some do! Some don't. There is one English psychedelic outfit I like called "Ozric Tentacles". Every album is pretty much identical. And it turns out that I really like that album, so I have bought it ten times over the years, plus a couple of live albums. This happens in part because whenever the people behind Ozric Tentacles want to make something different from their trademark sound, they'll usually put it out under another name. If you go to their site right now the front page advertises recent albums from two different side projects with even sillier names than "Ozric Tentacles". (The Ozrics are far from the only band to do this, they're just the first example that comes to mind.) There are other bands I like where every album is something different. King Crimson, for instance, is a different lineup for pretty much every album. Same bandleader, some people return to perform in multiple incarnations of the band, some are only there for one album and some tour dates. I love some of their albums and some are flat for me. I'd still grab another one if I heard that Fripp had declared that the current assemblage of musicians he was working with was an incarnation of King Crimson, because the albums that work for me work really well. If it's a dud I just consider it a down payment on the next hit.