I didn't find out with my DS, so bought both for boy or girl, once he was here though I realised I had gotten way too much for a girl & not enough for him. So for DD I wanted to be prepared better & now for this bubba, Being a surprise pregnancy, we really couldn't afford to be buying everything again so needed to know in advance with time to prepare incase it was a boy. Luckily she is another girl & don't need much extra stuff!
I also like having my babies names picked out early & talk to bub by his/her name before she is born ITMS?