Hi,
Modt planes that I have been interested seem to exist in some scale or another, so I'm happy there. As for ships, lately I've been snapping up any merchant vessels I can find, and as long as I can find a representative type vessel (like a typical containership, Roll On Roll Off vessel, passenger ship or general cargo ship) I'm happy, I'm not really looking for any specific individual ship.
Though, when it comes to cars, I wouldn't mind having an example of some of the real cars I've owned. Moebious reccently put out a 2-door 1965 Plymouth Belvedere that is close enough to the 4-door that I had to make me happy and I also have a model of the European Spec Fiat 500 that is close enough to the US spec one that I owned, but I wouldn't mind also seeing a 1978(?) Ford Fiesta, a 1988 Mazda 323, a 1993 Plymouth Sundance, a 2000 Mazda Protege, a 2001 Hyundai Accent Hatchback, a 2005(?) Toyota Matrix, a 2017 Chevy Spark, or a 1951 Buick Special.
I once had a chance to pick up a resin 1951 Buick special body on ebay but let it slip away and haven't seen another since
Additionally, on a more off hand note, I also would love to see something like a cut-away view of a ship's gun or missile launcher and/or maybe even a ship's engine room, because it would be interesting to see the complexity of those systems, but that would probably be asking alot.
Pat