You know, part of the problem I am going to have with this thread is that, when I was coming of age musically in the '80s, I just didn't like "'70s music." It just sounded so dated and "inferior" to me at the time. That's more my own issue than a problem with any of the bands of that era per se. But that mindset colored my perception of anything from the '60s and '70s for a long time. And I nevered own much from that era as a result.
Because a lot of bands I have liked have covered a lot of '60s and '70s songs, and because I have just been exposed to a lot more, I have opened up quite a bit to the music of that time. But still, the production and overall sound can still sometimes be a barrier.
Taking this and going back to Zep, they are one of the bands that epitomized what I didn't like about the sound of that time. For some reason, their sound still grates on me to this day. And I just don't like the timbre of Plant's voice. Never have. Didn't like his '80s solo output either. But that said, I find that I quite often enjoy Zep covers where the sound is slightly modernized and the singer doesn't try to sound too much like Plant. Through that, I have come to appreciate the songwriting, even if I don't care for their albums.
The Who are a different story. I initially avoided them just because of the era when they were big, and that same type of sound. But through constant exposure to their hits, I have come to like quite a few of their songs. I don't know many of the deep cuts, and I don't own an album, and never have. But I like many of the songs I have heard, including many from the album in this thread.
Ditto for Skynyrd. And they had an extra strike against them in that I also didn't really care for "Southern rock" at all either. But I have come to appreciate some of their music through time as well. Gimme Three steps is fun, and A Simple Man is fantastic. I still don't care much for Freebird, but whatever. I don't exactly hate it either. I can't really speak to the rest of the album because I don't know that I've heard any of the other songs.