I don't know if I'd divide the world between upper and downer people, I mean, if we want to go with a dichotomy, I'd say it's people who use drugs to be more engaged with the world vs people who use drugs to be less engaged with the world. For the most part that will translate into uppers vs downers, but there are some people who find opiates very pro-motivational, and pro-social, and I'd hesitate to call them downer people. Plus, where would you put drug users who use psychedelics, cannabis, or dissociatives? They don't fit into the up vs down system clearly.
I would fit squarely into the category of people who use drugs to become less engaged with the world, and prefer downers, but I like smokin' ice too, ya'know? (Also, I don't like the term "escapism" since it is laden with negative connotations, I just think different people like to be more or less engaged with the world, and neither is the "better" choice, it's just personal preference)