Yeah, I'm just gonna go ahead and actually answer the question as well.
Whitespy420 said:
the most pronounced feeling is the LETS DO SOMETHING
Exactly. I haven't done it a million times, but I've done it a good deal. (I should note that I've only smoked it, never snorted or slammed, so that's all I can comment on.) Each experience is slightly different because the product is slightly different, but the common thread is always just that great motivation. Cleaning house, folding laundry, writing an essay- just any task. If there's something that needs to be done, it gets done on this shit.
Most of the time I also feel rather social, although not always. I always do it with friends, and I usually get bummed if we run out of time, where I just have to do it and then go home. Like I mentioned before, I get shit done, but I like to have lengthy discussions with my friends. They can be good discussions too- it's not like coke where everyone feels the need to talk at once. I don't feel overwhelmed with the need to speak, I can listen as well.
I don't know if I'd use the term euphoria to describe any of my experiences. There are certainly some that have been pretty happy, it tends to put me in a decent mood, but I don't think I'd say it makes me giddy. I'm usually more excited in the process of obtaining it rather than while I'm actually doing it.
Also, I can't really attest to the porn thing... the stuff seems to make me disinterested in sex and masturbation. I never feel like masturbating while I'm tweaking.
And although I know people who have stayed up for 10+ days at a time, I myself have never stayed up for more than a couple in a row, partially because I usually don't buy that much at once, and unless I have stuff I need to get done I'll just take a sleeping pill to get to sleep. I know it's very easy to let this stuff get out of control and run your life, which is why I try to do it occasionally and in moderation.