Carnac West lol.
It is limited to US, canada, australia, and some european countries.
This means that it
- has the most ratio of english speakers than all other servers
- is the least flooded in daytime, because 99% of turkish players are blocked
- is the easiest to log in, because most premium users are from north america, meaning it'll have a nice ratio of prem-free users at all times, meaning you'll always log in.
basically it is the only server that you can log onto, during day time. trust me, all other servers will give you the "only premium users can enter" 15 hours everyday.