IN MY OPINION, to handle 3+ kids, it is a requirement that you must be an organized individual with good time management skills. I can honestly say that I possess neither trait. As I have gotten older, I have started taking some organizational short cuts just to make my life easier, but by nature, this is not an easy thing for me. I inherited some pretty gnarly pack rat genes and I have to fight them daily. In general, I'm not a very sentimental person, so the stuff I "hoard" is usually old receipts, junk mail and magazines. I just let that kind of stuff get away from me until one day I can't see the mail basket anymore and I chuck everything.
The more I think about it, the more I think it might be selfish for me to want another child. It would be asking so much of Derek, who supplies the majority of our family's income. I would worry that he would feel pressured and stressed to succeed and provide for us. And we have been SO blessed with two healthy, happy boys. I know a lot of couples struggle to have just one child. Right now, we're in a good place. We are financially able to support our family with relative ease. Our house is just the right size for all of us. And the older the boys get, the easier it has gotten, and my sanity sure does benefit from that!
For all these reasons, I think for the foreseeable future, it is safe to say that we are a "two and done" kind of family. But honestly, I will probably always entertain the notion of future children until it's no longer an option (like after Derek's "procedure"). So if I can just hold out three more years, I'll be in good shape!