Been a Zeppelin fan ever since I borrowed my sisters albums, that she'd get so mad about, for years.
Imo, it is too hard to pick a favorite with so many great ones.
Stairway to Heaven live from Madison square gardens is tough to beat, but there are many others, like I mentioned, that can be as equally good depending on what mood one is in.
https://www.youtube.com/watch?v=6hBLHkmBKDg