You my man, are one lucky fellow!! And that's because one, you survived the accident, and two, because your ostomy is reversible! If I were you I wouldn't focus on the worst case scenario..........I'd focus on the best case scenario. And that's what you doctors have told you in that it's 100% reversible. 100% is a lot......it can't get any better than that........so focus on getting well enough to have it reversed and don't look back. Now had they said 80% or 90%........I'd be worried a bit, but they wouldn't have been so certain if they weren't sure about your condition. They normally err on the other side when they tell you about such things......so you're in good shape.
But to calm your fears anyway...........a colostomy, in my humble opinion, is the best type of ostomy to have. The range runs from having the least bowel (ie, me) to a colostomy, where you have the most bowel intact. Your quality of life, which is what you are concerned about, is directly related to how much bowel you have left. And that's because how much bowel you have is directly proportional to how normal your life will be with your ostomy. With a colostomy they are literally just moving your asshole to your abdomen. Sounds bad, but in the grand scheme of things, a very liveable situation. That's not to say there aren't issues that folks have to deal with, and I don't mean to trivialize a colostomy in any way, but things could be way way worse. And there's different degrees of colostomy....meaning if any part of your colon is rerouted to your abdomen and not the full colon.....then things start to get more complicated. But bottom line.........the more functioning bowel you have intact.......the better your quality of life will be. Others will chime in here to give you their opinion, and I can see where someone with a colostomy might think things are pretty bad......but unless they've walked in the shoes of someone with less bowel.......I'd say they're being a little naive. Again, just my opinion. Think of it like Gangrene. If it's just on the tip of your toe and they have to amputate....losing the tip of your toe ain't so bad. Let it progress a bit and have to lose a foot.....that'll suck, but it could be much worse. Keep going and you have to lose your lower leg.....starting to suck big time..........your whole leg........you're life is changed in a big way. An ostomy is the same way.
The good news is no matter what type of ostomy you have..........you can adapt and keep soldiering on with life. It won't kill you. And as you get older that's what you focus on.....not the stuff that slows you down.......the stuff that kills you! So rest assured no matter what happens with your ostomy you'll be fine. You'll make some new friends (on here and the other ostomy sites), and other than building your character a bit and helping you appreciate what's really important in life......you'll still be you and be able to live a long healthy life just fine.
Many of us would give our left testical (maybe both) to be in your shoes...........so relax, do what your docs say......and get that reversal and forget all about ostomies and places like this. I'm betting you've already been humbled a bit by the experience, so it's already made you a better person! Best of luck to you and hopefully we won't be talking again!!!