I'm in the same boat, and it does feel weird sometimes. I feel like the families who have two kids of the same ages (two years apart, generally) seem closer to each other than they are to me because they have twice the interaction or reason to bond. It was definitely weird when my daughter was 2 and half the people I know with kids her age were pregnant again and I was like, "I'm over here, able to drink."
No regrets, especially once the various "freedom" milestones hit - you know, no more diapers, no more 1-3 afternoon nap, no more daycare payments. Then I felt bad for those who were stuck in the trenches for more years.
