I have to be honest. The players in StarZ and Anarchy seem to be more socially active than sympathy. If you're going for friends/people to hang with and have fun, I would choose one of us. Don't force me to choose between me and StarZ, though. I'm obviously biased, and I am pretty good friends with most of StarZ...
I might recommend staying in sympathy and creating an alt. that way you can stay loyal to them, which is always a good thing
Dunno about mostwanted, but I don't mind having a low level alt in my guild, as long as you are moderately active. Asmit joined with his alt, and it's like, lv 10 xD