A good top shelf tequila and mixing by hand, not relying on margarita mix, then serving it rocks (not slurpee-style) in a highball glass makes a very decent beverage that is not froufrou at all. Salt optional. Cuervo Gold at a minimum, Patron if you’re feeling flush.
Arguably the *BEST* margarita is found at Su Casa, La Jolla, CA. Otherwise homemade is best, if you use good quality ingredients.:)