We have three in the home. (Dh and I have two together, and each have one from a previous marriage.) There is a 9-year age gap between ds1 and dd, and almost 3 years between dd and ds2. After dd, dh and I debated about having another (dd was a surprise; neither wanted more kids because we were done with babies...yeah, okay
). I felt strongly about dd having a closer sibling, and like Katigre said, is has changed the family dynamic for the better. Dd *loves* her little brother, and ds2 adores her - they play together, and dd is so sweet to him. And dd thinks the sun rises and sets on ds1 - nothing is better than a big brother. And ds1 has a special bond with both his younger siblings; he's glad they are here, and wants to know when we're having another one.
We are in the opposite holding pattern here - dh absolutely wants another. I'm not sure. I *hate* being pregnant, and each time dh brings up the idea of another baby, I recite the Jim Gaffigan bit from his Mr. Universe tour: "I helped too. For like five seconds. Doing the one thing I think about 24 hours a day."