I'm curious why you ended up having two?
My wife and I are done with the one. I think we got lucky - she is a sweet, fun and fairly easy (for now) two year old, but the decrease in life quality is significant. I didn't want to further extend the monotony of our current life by having a second.
Overall my advice to anyone would be if you are not missing anything in your life and are happy, you don't have to have children. Other people might tell you how great it is (after complaining a bunch, and then complaining some more later) but that's their life, not yours.