Tired of 1017 errors?
There's tons of space on both EU and JP servers. What you may not know about EU servers is that they are housed in the exact same building in Montreal as the NA servers. Same servers, same location, different label. And it may surprise you to learn that many in the EU speak English. One of those countries even purports to have invented the language!
JP servers are generally quiet during NA prime time, so this is also a viable option, especially if you're on the Pacific coast (which may result in better ping times than Montreal, oddly enough).
So, if you'd rather be playing than looking at a login screen full of errors, consider this as a viable alternative. You may even make friends with people from around the world while you're at it.