This is all about James Dean coolness (without trying TOO hard to be cool).
Retro/Vintage 1950's, Western, Manly Vibe.
I took most of my inspiration from the picture below and from my favorite
James Dean movie, GIANT.
I seriously died when I saw the wider version of this picture...because I had already decided that this James Dean room needed Mounted Longhorns...and then I stumbled on this wider picture of the same shot...and ZING! Mounted Longhorns!