Here is the simple breakdown of how it went and how it is. I was circumcised at 26, best thing I did and am not regretting one bit. I did not have any issues as in phimosis or anything. The foreskin was fine, but I did not feel fully comfortable in it--looks-wise, hygiene wise, convenience wise, sex satisification wise, etc. This should cover most of your concerns.
Circumcision is a BIG decision and something you must research and think about a great deal before you finalize your decision. I did it before I, for many years, did not like the foreskin for these reasons:
1) Not attractive (anyone who thinks an uncut penis looks better than cut just is in denial. The majority of people find cut to be better looking, especially American girls). The way the head is covered does not give it an appealing look.
2) Easy cleaning (the foreskin can get smelly if you don't really take care of it well. I take like 1-3 showers a day but still feel dirty, especially after peeing because residue pee does get trapped under the foreskin). During the hot, humid summer season, it gets very damp down there! You sweat a bit more. If you don't trim your pubic hairs, when you roll the foreskin back to piss your hairs sometimes gets trapped in the foreskin as it rolls back, so that hurts and sucks. Just some of the reasons.
3) Girls seem to prefer it and I like the feel of being cut more. I almost don't remember living 26 years uncut.
4) It is easier to PE if you stretch or use some devices. PUMPING is much better without a foreskin as with the foreskin, the donut effect is just the ugliest thing!
5) Major reason is SEX! Although the foreskin keeps the head sensitive, I found it actually getting in the way of good sex because of the friction. The foreskin rolls back and forth and that minimizes your feel of the girl's mouth or vagina. You can hold the foreskin back, I guess, but that isn't really all that great. But this is preference so you decide. I hated it. The way I think of it is, think of a long sleeve shirt as the foreskin. If you take the other hand and stroke that arm, you will notice the friction of the sleeve and how it rolls back and forth. Now roll that sleeve back and stroke it the same way, you will notice how you can feel the knuckles, the wrists, the forearm, everything! That's the difference between foreskin vs. no foreskin.
NOW, sensitivity is an issue!
Here are some of the negatives I do notice though. Read carefully!
a) There is definitely less sensitivity once your foreskin is gone since a lot of nerves are lost. However, you still have your glans and a little area of skin around it which is still sensitive. But, sex is different because there is no friction (sleeve analogy). My orgasms are not as powerful, but I still prefer it now than before. This is all preference, however. I personally like it lots more...I feel freer and the rolling/gliding of the foreskin was a nuisance to me. It kept the head sensitive for sure and lots of nerves sensitive when rolled back, but wasn't worth the bad sex experiences I had.
b) Masturbation was better when I HAD the foreskin though. Jelqing seemed to be easier with the foreskin too.
c) There is risk to the procedure, but in terms of surgery, this is the easiest of surgeries. All it is is cutting aways some skin and suturing it back together. Took less than 30 minutes. And it did not hurt. IMPORTANT: I wish I asked my urologist more questions before the procedure!!!! He was the type of doc that has done the procedure over "thousands" of times, director of the Urology department, etc...who seemed to just breezed through the initial diagnosis and I felt intimidated to ask any questions. DO NOT BE LIKE THAT! Ask as much as you want. It's your body!
My procedure went well and it looks pretty good! But, I wish I had inquired about it further. For instance I wanted to see if he could do it differently from the technique he used which is the "guided forcep" which is how they circumcise babies--the foreskin is pulled out and cut, then sutured to the shaft skin. That was how mine was done. The negative of this is that you do lose that sensitivity of the foreskin that has developed since you've been a baby!
I wish I asked about another technique "Sleeve Resection" where the foreskin is pulled foreward, then two circular incisions are made at the shaft and removed and sutured back so you will have ALL or MOST of that foreskin nerves still with you!!!!! Amazing! You lose only shaft skin which isn't really sensitive. This is a much hard procedure, but not really difficult if you think of it. I wish I inquired about this! Here is an article that discusses it!
How do you perform an adult circumcision? - By Daniel Engber - Slate Magazine
This is just an overview of the process. I have no regrets about it and much prefer it now because it looks better (I'm not nervous about walking around in the steam room at the gym), it feels much free-er and I don't have to roll my foreskin back to keep it from sweating (Oh, if you get turned on and get that "drool" affect, like when a girl teases you, well that drool gets trapped in the foreskin too and that's uncomfortable).
These are the things and concerns that come to mind. Feel free to ask me questions (PM) if you like and I will help as much as I can. I wish I saved those pre and post surgery pictures. I kind of figured I was starting anew so I deleted them from hard drive--not too bright.
Good luck!