My honest opinion is that opiate addiction is one of the addictions without physical consequences (sure hormones become imbalanced and sex life can be affected) but at least you don't have to worry about psychosis or heart problems down the line.
They do steal the color out of life a bit and especially the longer you go dependent on them. I didn't realize until I stopped how much they were bogging me down and stealing my emotions--the good AND the bad. I am a bit happier without them, and the perpetual anxiety about having to worry about withdrawals and having to lie to people close to you on a regular basis is not good for your mental health. Should the time comes to withdraw, know that it'll probably be for the best. They really do lose their charm in the long run and then it becomes dark.
Also, depletion of testosterone makes you not feel like a man anymore. Low T = feeling crappy all the time, depression, and lethargy. Good luck
I can state with absolute certainty that ANY addict who has used opiates long term turned out to become miserable. They all seem far happier when they get past the withdrawals and sober up. I just think that perpetual use does cause depression and the buzz loses it's anti-depressant properties. Long term opiate addiction has never lead anyone to a light place. But as I said, you can walk away physically unscathed at any time and everyone should be grateful for that.