First of all, the OP specifically asked for MEN to respond, yet many of the posts are from women.
Second of all, congrats on the upcoming birth of your son!
I am a man who was circumcised at birth and who had a son and chose circumcision, although we did debate it for a while. For the record, religion was not a factor.
My wife and I discussed the options with our doctors, and decided on having him circumcised using a Plastibell:
https://en.wikipedia.org/wiki/Plastibell
Our OB left the decision up to us, and stated it was about 50/50 with new parents of boys in her practice, but she did recommend the Plastibell method, should we choose circumcision. She stated that her son was circumcised, but did not give a reason. Her father was also an OB and was one of the first physicians in the state of Indiana to utilize the method and it is the only method she uses.
The recovery was exactly as our doctor said it would be, and there really wasn't much to it. The recovery certainly didn't seem to be painful, and it just fell off, as she said it would, in about a week.
As for the reasoning behind our decision, I will admit that it was mainly due to societal norms. When my wife and I (late 30's) were growing up, it was unusual to see uncircumcised penises. I have had more than one woman tell me that she is/was grossed out by uncircumcised penises. I have never heard someone say they are grossed out by circumcised penises. I was in the military with a guy who was ribbed constantly about being "uncut." There were all kinds of "dic k cheese" jokes.
If that is one less thing my son has to worry about while navigating puberty/teenage years/adulthood, then OK. Knowing that with anesthesia and quick and painless healing, it would be a fairly easy procedure, we decided in favor of it.
I was also told by multiple doctors that there are still some health benefits to circumcision, although they are minimal in this day and age.
I absolutely understand why some people choose not to. As has been stated in this thread, we are the only advanced country where the practice is widespread for reasons other than religion, and the tide seems to be turning a bit.
With all of that said, I understand why parents would decide in favor of it, or decide against it, and I wouldn't judge any parent for choosing one way or the other. We're all just trying to do the best we can for our kids and none of us will always make the right decision.