I have this weird (I assume) predilection, if I'm smoking weed, I won't drink; not like actively smoking, like if I have THC in my system I'm nauseated by alcohol. I quit smoking weed when I was 18 to be a serious college student, drank a little bit, never liked beer opted for more powerful "fruity" drink particularly rum based ones.
I started smoking weed for my back in 2009, the very next time I was around alcohol my gut just started retching as soon as I smelled the booze, so I also quit drinking in 2009. I just can't mix booze and weed, my system won't let me.