This subject is absolutely on topic.
Many a man back then was unceremoniously evicted by his wife, significant other, friends and/or family for grievances related to his obsession with drum corps.
I don't know where Felix marched, but his over-the-top OCD fastidiousness would have been SOP in many a corps. Just consider some of the now quaint and outdated elements of the activity in those halcyon times: Inspection, Tics, FM 22-5 Drill and Ceremonies requirements, silence on the field, tempo restrictions, flag code...etc.
Felix Unger's personality was perfectly suited to drum corps, neurotic to a fault.
'Scuse me while I go polish my white bucks.