I didn't find our with my first 2 boys. With my 3rd pregnancy we chose to find out as I was worried about gender dissapointment.

As you can see we did in fact have another boy, I found it helpful as I dealt with my dissapointment at not having a girl and was able to bond with him. We however chose not to tell anyone so for everyone else it was still a surprise.

If I have a 4th (which I'm hoping for) I really don't know what to do, as I must say I much prefer the surprise of not knowing, but if it was to be another boy I would hate my inital reaction at the birth to be slight dissapointment.

Good luck with your decision