Oxycodone always was very stimulating to me when I was doing it. Not simulating in the same sense as amphetamines, or coke, but stimulating as in I had energy to work, clean, run around, etc. It was very hard to catch a nod from oxycodone.
Now on the other hand, most other opiates/opioids are more on the sedating side. Methadone is rather sedating, and heroin in anything above a threshold dose is also sedating. Oxymorphone, morphine, hydrocodone I would also put into the 'sedating' category. These drugs DO have the potential to make me motivated to work and get things done, but only when the dose is kept low. When I take a high dose, looking to get smashed, these are much more sedating, though. Like nodding out, drooling on myself, taking three hours to reply to a thread type sedation.
I prefer the more sedating opiates without a doubt. I take methadone daily, but before that I was exclusively shooting dope and dilaudid. Once I discovered these magical creations oxycodone lost its appeal real quick and coupled with the ridiculous price for oxycodone, I never really did oxy any more.
Na-na-na-noddin' I'ma-na-na-na-na-noddin'