My wife has 50+ salt variations in the spice cabinet.  She swears by sea salt, I don't.  To me, the dominant flavor in ANY salt is ... NaCl.  If you want some other nuance, just add that.
I mostly use garlic and "Italian spices", a blend of stuff, salt, pepper, chili powder in chili, etc.  I throw in some Indian stuff with soup.
Pure capsaicin would make pretty good crowd control stuff.  I know of a few compounds that would.