Marin Palisades in blue, roughly 1987, with Biopace. Stolen 5 or so years later at uni. I got my girlfriend into cycling as well, and we’d head out to the pub and clubs and wobble home off our heads.
The odd thing is, despite it being called a mountain bike, I had no conception that off road trail riding existed until almost 10 years later when my girlfriend bought a mtb mag because she wanted a suspension fork like the one I’d got on my new Marin Bear Valley. Initially it was all about the fluoro yellow courier bikes popularised by Muddy Fox, but then I grew in Central London with no car, so my idea of off road was within the tree and shrub sections of Hyde and Battersea Parks!