What is the best server to play on in Castlot?

The truth is, it doesn't matter what server you play on.  Every server is exactly the same. They are carbon copies of the other server.  They only have different servers because when one starts to get full they need more room for new players so they copy the old server and open up a new one but it's not any different than the previous one.

So really it doesn't matter which one you pick.  They really are exactly the same.

Some people who strive to be #1 in the game will always want to play on the newest server possible and rush to play on a new server when it opens but in the end most players, (the average casual player) isn't that hardcore and finds their playing experience just as enjoyable on one server as they do the next.