My 2 boys are 17 months apart and so far I'm loving the age difference, and would love a third as soon as possible! However I know once ds2 starts to move around things will get more of a handful. We took 19 months to fall pg the first time and the second time was a total surprise so I guess for us we'll just see what happens. We 'plan' on waiting till ds2 is 12 months before we actively ttc again, but if it happened before then it wouldn't be the worst thing! When I tell people I want more they think I'm mad! Good luck with your decision!