I agree this is tough. I remember buying II when it first came out, so it was my first. III I didn't like so much, but IV, well so many classics came from this. Then I got the first album and was really starting to get into the blues, "I Can't Quit You, Baby". Say what you want about Page, but he really played on that LP. Physical Graffitti? Well, Custard Pie is, IMO, simply a great rock 'n roll song. After that, again IMO, it was downhill. At anyrate, I chose the first disc in the poll, but could have gone with II, IV or PG as well.