Because of my love of ocean/sailor type stuff (thanks 20000 Leagues Under the Sea!), I often wear an admiral jacket that I got for 2 bucks. I removed the rank insignias though.
I also adore this military-style jacket I picked up for 2 bucks from a garage sale- hand tailored. It is incredible.
But, yeah, I use a lot of military pieces in my daily wear, but with a focus on older military. Pith helmets, trenchcoats, etc.