In the 80s it seemed as though everything was Zeppelin, including a lot of vocalists. It was actually kind of a bummer for me, since Zep wasn't really my thing. But hey, hard to knock such an influential band. I do own their last two studios and listen to Achilles Last Stand and Carouselembra (or however the hell you spell it) every now and then.
Zep will always be the band that people resent me for not liking much LOL! I've actually had people unfriend me on FB for taking down their Zep posts on my wall, leaving their Zep groups, or even just mentioned my not being a fan. Same with Pink Floyd, I've had people look at me like I'm out of my mind for not liking them.
More power to them, whatever inspires a person in a positive way is more than good to me Just don't push Zep (or Floyd) down my throat, I've had that done waaay too many times over the years with the radio and glorified clone bands.