I had to make this decision also. I am uncut, and most of the kids in my school were cut. So I felt a bit out of place when I was young. However, that could have been easily corrected if I had parents who
knew about this sort of stuff.
As far as I can see there is no good reason for circumcising your child. They do say that uncircumcised men are more likely to contract sexual diseases. I don't know why that is, but I can presume that there is more skin to make contact with. However, I don't think it's a huge issue unless you expect your child to have unprotected sex with a lot of different women.
If you concern is that his penis will not develop properly, you don't have to make that decision until after the child is born. I really don't think that being uncut has anything to do with the shape of your penis, but I don't know for sure. You can see what his penis looks like and make a decision. I can pull back my foreskin when I am soft, but it hurts when I become erect. My son is currently having problems pulling his foreskin back, but we make sure he washes and keeps it clean. His pediatrician had given us a cream to make the skin more pliable, but that has not worked as yet.
When my son was born, we decided to leave that decision for a later date. However, I think that can be a bit difficult, because then you have to take the kid back to have the procedure done.