History buff at first. I’m now modelling WWII vehicles in 1/56 scale. Focusing on a single scale allows me to have a good trade off between solidity and detail definition with an emphasis on details and historical accuracy.
I test print every model and they are available pre-supported or raw.

For people interested in physical models, here is a list of Licensed printers :

France : Premium Miniatures

Germany : Modelltrans

UK : Battlefield3D

UK : MortDeathMiniatures

USA : Iron Horse Collectible

USA : LittleGoat