There are 15 months between my dd1 & dd2...not really planned (that's what comes of celebrating giving up bf by drinking FAR too much red wine)!
Everyone we know thinks we are complete fools, but that maybe due to DH being a GP with a diploma in family planning (you'd think he'd know how to not make babies).
Anyway I don't regret it now as the two of them get on so well together.