I mostly do not like double albums cause of the amount of filler.
I tend to love double albums, even if filler is to be expected, I'm a sucker for albums that aim high and go crazy. If I actually had a problem with self indulgence I sure as fuck wouldn't be a prog fan. Compact single albums are great and all, but if some bands trimmed a double album down to a single album some of my favorite songs from those albums might have been lost in the process.
And I don't really consider filler that big of an offender anyway, as long as it's not bad
. I think filler can even make an album better because like a scene in a movie or a chapter in a book or a level in a video game where not much happens, it can serve as a breather between the more epic stuff and without it the work may seem too fast paced. Just my opinion.
The better double albums have the good sense to spread the filler around, to serve that very purpose. Except Physical Graffiti which crammed all of it's filler into side 4, though like I said before, I like to think of side 3 as the real conclusion to that album, and side 4 as the drunken after party.