My DH always wanted three, so it took a lot of convincing me LOL! I always wanted two, but DH was one of two (I was one of three) and he said it would have made better dynamics to have another sibling to play with.

We have a smaller age gap between #2 and #3 because I said to DH if we are going to have #3 lets do it sooner rather than later so we can move on from the sleepless nights, etc. quickly. This first year of DD's life has flown so fast and we are past all the really hard stuff already .

Regarding extended holidays, later this year we are going on a 6 week caravaning trip over to WA so having 3 kids hasn't held us back!

I won't lie, for me three kids has been HEAPS busier than having two, BUT it is completely doable and is totally worthwhile. DD has been an absolute delight and we couldn't imagine life without her. It's awesome to have one more little person to enjoy watching grow up and develop. And the best thing about having another child is that you never regret it whereas we may have regretted not having another (Just a point to throw at your DH LOL! ).

Anyway, good luck deciding!!