Roman History – a long term interest that only got indulged after I had to give up work (I went off and got a degree in it).
Reading – Fantasy ‘(sword and sorcery’ stuff), off-beat or ‘set in the past’ Detective stories, Sci-Fi, Stephen King, Terry Pratchett . . .
Learning to play electric guitar – 4 months in = 10 chords, some riffs, 4 songs badly.