We have 1 DS who's 18mo, and we did initiall think a 2 - 2/12 year age gap would be good for us.
For various reasons (money/work/childcare costs/PND) we've decided against this and are probably aiming for at least a 4 year age gap.
My mother, in her infinite wisdom said "that's really really bad" when the subject came up for the 50th time...
So.. .positives please. Tell me your stories of 4+ year age gaps and why they're so brilliant.