me lol i fell pregnant on DD1's 1st birthday they are now 3 and a half and 22months. there is exactly 20months between them. i love the age gap but i wouldn't have number 3 with the same gap lol. i think its a really good gap the older child is about old enough to be able to help out with the bub without having been too 'spoilt' (for want of a better word) being an only child for longer.
I actually found it so much easier to go out etc when DD2 was a little bub its so much harder now lol but i wouldn't go back and choose a different gap it just works for us they are mostly the best of friends and into pretty much all the same stuff.