My DS is September and my DD will be October. Love the winter pregnancy - especially since I suffer varicose veins. OB actually told me that because of that winter pregnancies are best for me because the veins would be worse in summer (but it just happened like that, we didn't engineer it!) Also love that it isn't freezing cold to get up for night feeds.

Downside - apparently September a very busy month in maternity hospitals so you have to book in early!

The other thing that I think about (and I know this is nerdy) is that I don't want my kids being the youngest in their year at school so I'm pleased that so far my babies are born in the second half of the year. I was one of the youngest in my class and I hated it.