DH and I were just going through this last night. I don't want a name that's too different, but I also don't want a name so popular that there's two or three per classroom.
For a girl, I like Carolina (pronounced Caroleena), but DH says everyone will pronounce it like North or South Carolina, so no. I like Helen, and I used to like Emma before it became one of the top five most popular names for the second year running AND the name of Jennifer Aniston's sitcom baby! That did it for me on that one. I like Greta but we named a cat Greta already. I also like Quinn.
However, we have decided on Joely for a girl.
For a boy, I've always wanted to name a son Jack. JAck Henry to be exact. Not John, not Jonathan, but Jack. I also like Christopher, but now I know a Christopher who just deluded enough to think we named the kid after him, so no. I also like Caleb, Elliot, Elijah (shortened to Eli), Jonah and Joshua.
For me, it seems harder to get a boys name that is not too popular or over the top. There are so many Hunters, Tylers, etc. that I won't go there. And the most popular boys name for the second year in a row is Jacob.