Q:
Ours is not to question why, ours is but to do and die
Changing servers
A:
From the Wiki~
To transfer to a different world, go to the character selection screen (using F12 or when you first logon) and select the desired world; you will be logged out while the game makes these changes, which might take 5-30 minutes. You can transfer once every seven days at a cost determined by the destination server population.
Medium: 500 gems
High: 1000 gems
Very High: 1800 gems
The transfer fee is only charged if you have characters on your account; in other words, if your account has no characters or you delete all existing characters first, you will be prompted to select a new home world after creating a new character, free of charge.
In addition, you can “guest” to other worlds (but not across the EU/NA boundary). This won’t let you play in WvW on the guest server, but you can do all the PvE content there. That might help you choose what server to transfer to, as long as it’s an EU server you’re considering…