Looking to get back into the game..
All servers now use the “megaserver” system for PvE and sPvP. The only reason to be concerned at all what your homeserver is called is for WvW (http://wiki.guildwars2.com/wiki/Wvw).
http://wiki.guildwars2.com/wiki/Megaserver#Megaserver_system
This is good news. Thanks for the info Thrash. I’m excited to get back on the game soon!
Tarnished coast is a great server but usually full. Just look for a high pop server and you’ll be fine. As the post before me said servers don’t matter much anymore besides wvw. With the addition of the group finder you can easily q up for any dungeon or fractal and it fills up fast. Now all pugs aren’t created equal of course but as you are returning I’m sure you’re not ready for speed runs anyway. Good luck and welcome back!