First time trying this stuff it felt kind a like a slightly less euphoric and cleaner (way less noradrenaline effect) version of speed (amp sulphate).
Now when it I take it (rectally) I get rarely any euphoria and mainly anxiety. I always get anxiety from stim comedowns (I have anxiety disorder) but not usually from the main high. I'll try not taking it for a week and then try again, overall it's mediocre as hell, not to mention you can't snort it (or at least shouldn't be if you don't want your nose to fall off).
I get very euphoric from Ethylphenidate, but I agree that it's MUCH cleaner than any other stims I've done before. I would compare the euphoria to that which I get from Adderall, only without the twitching and sweating.
I also take Metoprolol for chronic tachycardia, which I developed when I was 25 after a 5 month IV Foxy binge. Doctors have no idea whatsoever why this would of happened, but for the last 13 years, my sober, resting pulse without a Beta-Blocker is consistently around 140bpm. However, I've had every medical test known done to me, and none of them show anything wrong with my heart. My point in telling about this is that Metoprolol is an NE antagonist, so even when I take Methylphenidate I don't get a whole lot of physical stimulation symptoms, just the euphoria pretty much, so my perception of the effects of stims probably doesn't apply to many other people.
That being said, Ethylphenidate, which I just tried for the first time last week, is by far my new favorite stimulant! This is because not only do I find it extremely blissful, but I haven't run into any unpleasant side effects except minor, transient nausea, and I can actually fall asleep roughly 6 hours after my last dose, which I find impossible to do for quite a long time after the effects of other stims wear off.
If you get overwhelmed with anxiety on the come down and don't have benzos handy, try Valerian extract. It works just as well as benzos for anxiety and insomnia without causing intoxication, memory loss, or hangovers. Namaste!