I hate Obscured By Clouds. I've tried to like it, but it's just awful.

AHM is one of my favorite Pink Floyd songs, and most people think it's just alright and not awesome, but a lot of people say that it's underrated, so that in itself kind of makes the song not underrated, since so many people think it is.

Grantchester Meadows is another one of my favorites, and it's underrated because it's on Ummagumma and most people don't like Ummagumma all that much. Actually, I would say all of Ummagumma is underrated because I like the whole album.

And while we're talking about underrated songs, let me talk about the exact opposite and say that WYWH (the album) is overrated. SOYCD is brilliant, but Welcome to the Machine and Have a Cigar (almost half the album) are mediocre songs.