Bands that never dissapointed you

Opeth and Led Zeppelin. Every other band I really like have released at least one dud album somewhere along the line. Even Iron Maiden (my favourite band). Sigh.
 
I was sad to find out that I can't come up with a single band for this thread.

edit: actually, I could put Radiohead
 
I think a few people are confused it's band's that never disappointed you, not bands that always disappointed you. I mean come on, I thought even power metal fans would acknowledge that pretty much every band in the genre has at least ONE bad album. But then again this marc b guy said he is proud to be ignorant.
 
10 000days didnt disappoint me, it had some cool songs and some shit ones like the previous albums. but there was some really kooky ones, like viginti tres i think
 
None of Slayer's albums have ever disappointed me, however I gotta say Dead Skin Mask has to be one of the worst songs I've ever heard.
 
Opeth,Pink Floyd,Death,Creed,Alter Bridge,Children Of Bodom,Dimmu Borgir,Dream Theater,Korn ,Katatonia,Iron Maiden
 
10,000 had some amazing songs and some ok ones. It's my 4 favorite Tool album. Still the awesome album art made up for the slightly worse music. The Pot, Jambi, and Vicarious RULE!!! I wasn't disappointed by it.