OK, so a bit of a twist on guilty pleasures, I guess...
What are some artists or releases you like that read like a terrible idea but somehow you love them in spite of that?
Sufjan Stevens' 'Illinois' is a prime contender for me. Music-wise, it's mannered, polite, carefully (and ornately) arranged. Lots of bits that sound like a musical, no evidence of friction, of physicality, or of party vibes. The opposite of punk?
Lyrically, it's earnest, sexless and may have loads of wit but very little humour (if you get me, e.g lots of word play and things).
Maybe Justin Timberlake's 'Justified' should go here too? Ex-boy-band singer rips off vintage Michael Jackson and others in a spit-free rendition of R&B that's like eating 5 boxes of chocolates in one sitting.
How about bands like Galaxie 500 and Spiritualized and so on? Even Slowdive. They all seem like they should be endlessly boring, they've all got one fucken song, but I reckon they're generally great.