unheralded songs you have special affection for

Not necessarily the same as underrated, because maybe your appreciation of the song is rooted in some sort of nostalgia or something or you're just a sucker for this or that element of a song.

Anyway Cat Power's acoustic cover of (her own) "In This Hole" has pwned me from the first spin and I play it almost every day and never tire of it. Never heard/seen anyone give it any special praise or notice.