I`ll go in order.
WAY - I know almost no songs on that one, save for ILRR and AORTB and Hapy Birthday... and well, the music wasn`t as good as for In 3D. My least favorite I think.
In 3D: I love almost every song on that one.
DTBS: Haven`t heard much of that one, but it`s not a bad one. Not my favorite but not bad neither.
PP!: Not bad, not bad, but not excellent. Only time an Al-bum was called Polka right away.
EW: Not as "ewwwww" as its acronym says. I like it. Some aren`t good, but many are. I like VE, Twister, GOD, Fat... well, many. I really like it.
UHFS: I know only three songs outta it, HRP, MFN/BH and UHF of course. But it sounds more of a spoken album anyway.
OTDE: I dunno why but I feel like that one is more Rock then the other albums. Not that it`s a bad thing... but still, not my all-time favorite.
Alapalooza: I know only four songs off this one, LITF, and three others. I don`t really want to look for the others. Maybe it`s the pocket.
BHD: Great! At first my thoughst weren`t positive until I stepped on EYKIW' and later on SYBG. Al`s vocals are awesome. One of my favorites.
RWS: Good. Fine. Great. But I feel Al has gone over the hedge - I mean, over the boundaries of acceptable. Isn`t JS and TDS a bit too much of a dangerous combination with these adult jokes? My opinion as always...
PH: I like that one. Sadly I feel like Al has gone under many scatological jokes, and this kinda ruins the fun of it. I suppose. But GIF, I love.
SOL: Once again, an exceletn album, I`m hooked on Pancreas, though Trapped in the Drive-Thru sounded a bit too serious... maybe its the Quebecers` very often unacceptable humor that causes this (yes but yet again, earlier I said I didn`t like songs going unacceptable... what a paradox. Life is full of them, a constant threat for robots.). Good album.
As for IL... they`re all good except Craigslist. Dunno why but that one just doesn`t finds the beat in me.
So, my all-time least favorite is WAY, the album and not the person of course.
I`m a harsh critic, I know.

Whatever.