Alcohol...
Personally speaking I'm not a fan of the way I feel when I smoke pot. Alcohol I can drink without getting drunk because I enjoy the taste (wine with dinner, a bloody mary at brunch, something fruity and rum based by the beach, a beer on the dive boat - AFTER the day's dives are over, of course). It accompanies various other activities I enjoy outside the house. Pot seems to serve no real purpose or enjoyment beyond it's mood altering properties, and I've already stated I'm not a huge fan of how it alters mine.