Dear Zeb,
from the very start when I was a teenager in high school, I collected headgear, first really everything, fire brigade helmets, police caps, bowler hats, ...
then as a student I restricted myself to military headgear, from all periods, as a student with a very modest budget, Russian cold war stuff, (finished high school in 1989 when loads of east European stuff came over the fallen iron curtain, bought my first pickles in that period though, and en belgian casque reine elisabeth...
fellow student liked my strange hobby, my girlfriend (now wife) tolerated it.
later on when becoming a professional restricted myself to WW1 period,
and that still is the collecting domain till today more than 35 years inn collecting later...
my wife still tolerates it, my children are kind of fond of the collection.
havent grown up I now try to buy up to five really interesting objects each year in staid of the flow of easy to get available stuff...
Still had to promise I would only buy new things if I also got rid of other objects.. don't really hold to that promise, the objects are just to dear to me...
Like you I do still collect more than german imperial headgear, in my case also french Belgian US british anzac, Austrian Russian, Dutch, etc,
that's why I like your collection very much, the diversity of the headgear of all those nations is awesome!!! really like it, thanks for showing!!!