I've been a little focused on them as well. Part of the appeal, for me at least, is they have a very masculine feel to them, with some not being too far out there. Plus, as an added bonus, they're real, not made up and not overly used here. The most common place to find them here seems to be on a hockey team.
I'm really liking
Sven,
Ivan,
Dimitri, Yuri/Jorgen, and
Vladimir. My husband likes
Viggo. I don't think any of those are too out there for the melting pot I call home.