What is your ideal number of children?

Initially, I wanted 2 kids but now that I have 2 kids, I want another one. I don't know if it's crazy maternal instincts that I am harbouring but after the birth of my son, I really really want another child. Perhaps because I only have 1 sister, I'd occassionally envy those with bigger families. Bigger families always seem so loving and loud, plus family gatherings would be awesome with big families.