If you're going to transfer, go to a mid-rage population server. One that has some shouts and active linkshells, but not so overcrowded that you're always competing for everything.
I'm on Bismarck, and I'm quite enjoying it lately. Sometimes you need to shout for a while to do stuff, but there are a few active linkshells, and you usually end up getting what you wanted done. Also, people all know each other, whenever you zone into a town 10 people will /wave at you. If you're not a jerk, people are helpful and pretty decent. There's not so many /yell arguments link in the past (those players all quit or jumped server). Yet, there will still be times you go to dragon camp during gain xp RoE and no one else shows up for the whole 4 hours (it's uncommon, but it has happened to me twice).
I /sea all about 700 people around jp midnight during the week, 320 NA weeknights, 500 NA weekend evenings.