Congrats trish!
As I have now had num 3 I see advantages of a slightly longer age gap
Dc1 & 2 were born 16 months apart. My pregnancy with dc two was hardest of the three - I had spd and a baby who needed carrying and pushing in a pram, I was super tired so couldn't face making ds 1 homemade purees as I had with ds1 I was also very sickly and the smell of baby food made me want to be sick. Ds1 went from 8 to 16 months in a diet of cereal, tins of pasta, fruit and toast because I couldn't cope with the smell of other things!
My ds1 also had to grow up fast because at 16 months he wasn't a baby any more. He is now very independent which is nice but I wish I had had more one on one time with him. Ds2 was a very needy baby and screamed until he could crawl!
On the plus side they are now the best of friends, they share interests and play well together most of the time
Having dd four years after ds 2 I Feel I can enjoy her more as I'm not juggling two babies! The big two don't need much apart from food And the occasional referee lol
Part of me would love another but it's not practical for us and I want to enjoy dd As much as pos