Congratulations on your wonderful news!!!
My sister was born 2 days before my first birthday. Mum went onto have 6 kids (We are #1 and 2) so I think that in general it was OK. There was 3 years between us 2 and my brother!!
Look from a kids perspective it was fine but not fabulous( honestly I put it down to both of us being girls). As the older one I missed out on doing stuff "alone" (I got my ears pierced at 11 yo but my sister got them done at the same time so she was 10 yo). We are VERY different-I am studious and academic while she is not. This caused great tension particularly come VCE time. She is more sporty which caused tension because we were in the same age grouping yet she was playing in a better team. We were close in age so went in the same social circles. A lot of my sisters friends had older older sisters (as in 5/6 years older) and so she never understood why I wasn't a "cool" big sister (despite the fact we were practically raised as twins).
There are many more issues that we have both had from being so close together in age. Now that I am not living with her we get on really well but I think we will both always have that chip.
Like I said I think all of this is 1/ because we are both female 2/because of our completely different personalities 3/We ended up in such a large family anyways.
We never missed out on anything and our family is still close and very loving. If the same thing happened to me it would be fine but because of my experience I am definitely waiting a bit longer.
I want to stress to you that while I make it seem horrific I had a lovely childhood. It always gets peoples attention that we are the same age for 2 days every year and our guy friends have always thought my dad is an absolute champion for "knocking mum up' so quickly!!! In the end my sister and I-despite our many differences and obvious issues-have a bond that no one else shares.
My mum says of her situation "I was fine because I had to be". She got through it and had a marvellous support network (my grandparents owned the pub down the road and each day Grandma would bring mum a counter meal for lunch for the first couple of years!!) Plus the fact that she had another 4 kids must have meant it was ok!!!