Yeah, going off of the server list here, Besaid has the most activity, but RPing scares me.
There are a couple social LSes on Besaid that I'm aware of that have little to no RP elements.
The one I planned to start (and I say planned
because I'm not playing until PS3 release, but the LS is going on without me) will only do RP at preplanned events.
FFXI-Garuda 2003-2009; Lakshmi 2011-8/20/13 (retired)
FFXIV: ARR - Ghost Bear, Balmung server