I am so torn on this subject, because part of my cultural tradition is to do very little planning ahead of the birth, so that you let the soul of the baby develop without outside influence. Traditionally, we do not find out the gender or settle on a name before the baby is born. So, last time, we went to the hospital with two girl names picked and two boy names sort-of picked. Luckily it was a girl, and when she was born, I asked my dh to choose which of the two names she would have. If she'd have been a boy, it might have been days before he had a name...
...which brings me to the trouble. If this is a boy, he may be nameless! DH and I never were able to figure out names we liked. I have strong feelings about naming children in honor of family that has passed away, so our choices are kind of limited to names beginning with R, N, S, or B (DH's grandmother or grandfather, and my grandfather or great uncle). The boys names I like are Reuben (Rube), Noah, Nathaniel, Ben, and Samuel. DH likes none of those except MAYBE Ben, a name just taken by my cousin's new son. He goes hot and cold on Reuben.
Girls names are easier for us somehow, but I feel so different this time that I'm pretty sure it's not another girl. I like Naava, Samara, Anya, Natania, Becca, Shoshana. I could probably talk DH into some of those.

DH doesn't want to talk about it yet -- so check back with me in a few more months!