I'll be ok with either gender. I'd be over the moon for a girl as would DH and the twins as they have apparently decided (on their own) that bump is "seester" so I guess I know what they want. I know I'll be sad if it's not a girl but I also know I'll be ok with a boy. I absolutely have a blast with the boys and have so much nice stuff that they have out grown, clothes and toys, etc. that I'd be all set for a 3rd boy.
Last time tech said boys at 12week scan for the twins but this time she said she has no guess. I'll find out on the 23rd.