I really don't miss much about being single. I love my husband (even though he can really irritate me at times) and I wouldn't trade my kids for the world (even though some days it seems they are hellbent on driving me crazy with an express ticket). I guess if I had to pick one thing that I miss most is the ability to just go.
Before I met my husband and had my children I could (and did) just pack a small bag and get in the car and go. I took many weekend vacations to my Aunt's in Minnesota or up north to the lake either by myself or with my sister - some were planned and some weren't.
Now even going out to dinner with my husband is a major production - find a sitter, feed the kids, pick up the house (so the sitter doesn't think we are a bunch of pigs!), go get the sitter, pay the sitter, take the sitter back home - all for an hour or two of quiet time! Add that on to te fact that my son has been having srious separation anxiety issues lately and most times it's just easier to stay home and eat popcorn!
I liked my life when I was single - I could do what I wanted, when I wanted and how I wanted - but I love my life now. I am raising the future, with my soulmate by my side. What could be more awesome than that?