I was Team Green with DS and we are Team Green this time around as well. DH has made the decision for us, and I've just gone a long with him. He's very old-fashioned (there's also more to it but I won't bore you with all the details). I'll admit that when I was pregnant with DS it drove me bonkers not knowing, and then you get all the unsolicited "It's gonna be a ___, because ___". But then after DS was born it's a lot of fun to go back through my pregnancy journal and notes from family with the baby's gender being a secret. The secret of it was irritating and fun at the same time. Plus, I didn't mind buying gender neutral stuff for him before he was born because that means we can use it with this baby too, and I have the rest of DS's life to buy him the boy stuff.
This time around I tried to talk DH into finding out, but it didn't work. In the end I'm glad that we aren't finding out, because I know I would be disappointed that I didn't wait.
It's a very personal decision for you, but I am very glad that we waited to find out in the delivery room with DS and I am once again very glad that we are waiting again.