I guess this is more suited to more belated discovery of an older band that you either hadn't heard of or hadn't thought to investigate before.

For me, I first heard of Carissa's Wierd on this very forum only a couple of weeks ago when somebody posted a link to 'So You Wanna Be A Superhero'. I went straight on to Amazon marketplace and bought a copy of every vinyl reissue they had in stock that same week. What was your last instant infatuation?