Finding out the sex at the scan - why not?

[MakesCakesWhenStressed]

So we have the big anomaly scan soon. I want to find out, DH doesn't. As the first joint parenting decision we make I don't want to just ride roughshod over him, even though he has indicated that he would be willing to reconsider, so I'm making up a pros/cons list for myself.

I have 8 reasons why we should find out, but only 2 on the why not and one of them is the (imho) completely lame "so we get a surprise on the day" - as if being a parent suddenly isn't enough of a friggin' surprise.

So help me make a balanced decision here - what are good reasons not to find out, other than the above and the fact that the scan may not be 100% reliable?

I am genuinely undecided. I think it's because I would like to be the type of person who waits, but in reality I'm the type of person who finds out.

I'll just get DP and DD to decide if we find out, and opt out of the decision completely!

I can't wait to meet my little one and see what he is like. Due on Monday, so hopefully not long now!