I will build anything that piques my interest. And I probably have. Massive sailing ships, real wood sailing ships, balsa and paper WWI fighters, vacuformed airliners (talk about smooth finishes layers of glossy lacquer wet sanding gloss coat decals more gloss coat then using fine pens to simulate panel lines), fighter planes, cargo planes, (Testors 1/48 C-130 anyone?), real space, sci-fi, armor, autos, warships. Just about anything now including mecha and anime kits. I customized autos by chopping tops, suiciding doors, opening doors, trunks, working suspension and throttle linkage. I'm waiting on a paint order for a couple of armor projects so I'm working on an old set of tie fighters.
Build what you want, have fun doing it, if you liked it then good. If you didn't, well that's also good because you tried.
One thing I want to try is doing a few custom autos. It's been a while but car builders are using nail polish for custom paint jobs because of the vibrant colors. I'd like to give that a try.
I like building 1/48 and 1/32 scale planes the smaller scales can be a bit hard for me nowadays but the larger scales you can superdetail to your hearts content or you wallets limit.
So do it man and have fun.