Well EVERY drug has a comedown. Their has to be a transitional period between being high and it wearing off, it's just the extent to which it sucks. Stimulants to me yes, do have a comedown, meth is just the worse. The ones I prefer, like adderall, ritalin, coke, etc., don't really have it to bad. Coke is awesome because if you know how to dose it, you can have 30 minutes of fun or 6 hours.
For a serious bender I'll usually stay up all night on them, then they're wear off in the morning, sometime before noon, but I'll still be too awake to sleep until that night, so like 2 days awake. I may also feel a little off and have that "sucked dry stomach" feeling and feel dirty because I usually smoke a lot and sweat more than usual. I've only done meth maybe 3 times and I never felt any addiction setting in. Never really had ANY addiction with a drug with the exception of Oxy, and even then it was just because I wanted the withdrawal feelings to go away, not so much "I want more". That's how it is with Coke and X, too. I'm not freaking out because I'm sobering up, it would just be cool to have some more, you know? Because you were enjoying how it was making you feel. A little X tip for you is to get this over the counter supplement called 5-HTP, a serotonin precursor. It basically increases serotonin production, but it doesn't release it to your body so you don't feel better, it's just that when you do take X, you'll release more serotonin. A lot of X users will take it daily for like 2 weeks before they drop to make the high better, then the days following they drop 2 a day to get their serotonin right again, thereby reducing the depression.
5-Hydroxytryptophan - Wikipedia, the free encyclopedia
Oxy has such a gentle comedown it's not even funny. When it wears off you'll just feel like laying down, you'll be SUPER relaxed, bed is really comfortable, and you'll just fall asleep. You will sleep crazy, too. Sober, I'm a very deep but quick sleeper, average about 4-6 hours a night. The night after Oxy it's usually 9-11 hours.