I was thinking (I know, a relatively new and untested skill for me) about what I would do if I was only allowed one scale for my diecast collection - a scale that would have to encompass
both aircraft &
armour.
I realised that for me the scale of choice would have to be 1/35, simply because these are the models perfected by both
GMP and
MiniChamps 
(1/48 would have to come a close second given
EI and
Carousel 1 products
).