Cars we've owned, or cars we'd like to own?
Favourite I'd like to own is a Marlin (now Javelin) Cabrio. If I had ten grand spare, I'd buy a kit to build. If I had twenty grand spare, I'd get one built for me.
Favourite owned. Hmm. Being a bit sad, I'm actually very attached to our Citroen Berlingo. Reliable, comfortable, extremely well-designed, great fuel economy, and it'll take a full PA system in the back no problems at all.