So I'm working on creating a backstory for my character so I can start RP'ing with him, and I was wondering, what's the best/most popular RP server in the US?

I will be RP'ing a Ranger of the North, if that makes any difference.

Also, this is the first character I've ever RP'd with, if that matters. I'm planning at the moment to start out with light to medium RP, and test the waters, so to speak, before perhaps moving up to heavy RP. Thanks!