I have to agree with Duoneo has said. A little over 5 years ago i had initially started on behemoth (for about a year because NA servers were not available for me) and moved to Leviathan after and never looked back.
There is ups and downs but it sure is nice to see new players around and listen to the various chats on how much they are enjoying themselves.
Before Cross Party servers were a thing people would move due to the raid scene not being of the highest (it is much better now) but that is also a thing of the past because of cross party thankfully.

The best of luck to you