I have 3dc and would like another. I can't really put my finger on why - I just like having children and want to I suppose! I do think that it will be lovely for them to grow up in a big family, surrounded by people who love them. And I like even numbers. I have a hands on dh and a big support network, so it feels achievable too. Need to convince my dh (who is convincible - he's not totally against). Just wondering what made you go for 4?