With regards to RP, you will see it. Every time i'm running around Ul'dah, its there. But it has been my experience that the RPers keep to themselves unless you run up to them and start talking to them in-character. They don't push themselves on others (like I've seen on some games) so it works out well, I suppose. They aren't -everywhere- either, so if you are not an RPer, you will not feel out of place.