I personally believe that [street] methamphetamine effects me much more positively than negatively.
My overall quality of life is significantly better whilst on the drug.
I have been a daily user for approximately 2 years now. My tolerance has stayed the same for almost a year now (my usage equates to about 0.2 g/day). This amount isn't something I hold myself to; I use when I want to (except for when I am at work, or a social function, with non-using friends - which are most of my friends - or parents, etc.) I don't restrict my use, I just use until I am comfortable, and redose as needed.
In the past year, I have opened my own business, and last week I was promoted to manager at my job, which is not an easy feat to accomplish at this specific place. I have been able to lessen my social anxiety a bit, and am able to leave the house and do normal things like grocery shop, run errands - whereas before, I was crippled with depression most of the time, drunk (haven't drank in over a year and a half), stoned to the bone (haven't smoked pot in 2 years - mind you, I don't have any ill will towards pot or those who use it, it just isn't a good drug for me, personally) and rarely left the house, and was terrified to go to work or see my friends.
Nobody is aware of my use except for the two or three people I use with.
I've never been in trouble with the law and have no record.
I have never and will never use this or any other drug intravenously. I am not saying using drugs via IV route is bad, nor the people who do - however, in my experience, I have seen up close the potential it has to quickly take someone from functional user to full-blown junkie in a very short period of time. That, and I'm positive I'd enjoy the hell out of it. So for me, it's simply not an option.
Of course, there are negative aspects - sometimes I get stuck on a specific activity for a bit too long.
I'm ALWAYS late. Not massively late, like hours, but 5 minutes late for work, or 1/2 hour late for social engagements, etc. I really need to squash that.
I notice in my speech, I often have trouble remembering the 'right' word for things, and my memory is shot to hell. Not sure if the memory part is a direct effect of the drug, because I had a difficult time remembering things before I used, but I'm sure it doesn't help. I believe that lack of sleep probably contributes.
Monetarily, I have struggled some because of choosing the drug over paying a bill or two on time, but nothing dramatic or life changing/threatening - I would never choose the drug over something essential and important such as rent, insurance, etc.
Some may look at this and say "that's the drug talking, she is all fucked up and can't see it, delusional, clouded by the clouds, living in a fantasy world..."
Maybe...but I don't think so. I think the results speak for themselves. I am the first to admit when I fuck something up, and I'm fully aware when shit is hitting the proverbial fan. I would be straightforward and say that this drug is fucking my life up - but it's not, and I choose not to let it.