Also, I believe that the finer the whiskey (i.e., the more it is aged) it is easier to tolerate larger portions ( but I have no proof to back that up).
“...and what is strange for me (and I have noticed this on several occasions), vodka puts me in a bad mood and can even make a sweet guy like me mean. It never happens with any other alcohol...very weird.”
Obviously you haven’t had much tequila. LOL