When I was young I hated seeing others on downers, mostly opiates and I gravitated towards uppers because I wanted to go out every night, party every night (and day) and I had the funds to just keep on going, so I'd do speed for days on end until the body wore out completely and the mind was no longer functioning at all. With the exception of alcohol, when I was <20 and getting into early 20's, I was always on uppers and didn't see that changing.
After that I stopped for a few years, except the drinking, been doing that for way too long and ended up getting a little bit too acquainted with opiates after years of using in moderation. The single moment it got out of control, in case anyone was wondering how I could use opiates for years occasionally without ever getting a habit was when I stuck a needle in my arm for the first time. That's when everything changed, no doubt about it.
Now, downers are all I care for but I'll still have some good ice if it's around on occasion, I love the rush but I hate the fact that it lasts so fucking long. It needs a stop button, then I'd enjoy/use it more than I do. If it's shitty quality I won't even bother, whereas if it's shitty quality heroin I'm still a sucker and I'll spend all I've got because that's the only drug that makes me feel normal.