My choices to keep:
The East Continent because of its depth of history that still has an impact on current events, interesting politics, and lively and diverse religious aspect.
The Far East Island because, taken as a whole, it has the friendliest playing atmosphere I've found in the game. Lots of well defined, and well played, characters and realms. Good roleplay. The smaller number of regions mean that realms compete for limited space much more than on the bigger islands, leading to island-wide wars in recent times.
My last choice is Atamara. I've mainly chosen this one because I think the map has good potential as a target island for invading realms from the closing island/islands. It's a big territory with very few choke points and good travel times between regions, meaning that the migrating realms would stand a good chance of gaining footholds and their arrival would trigger all sorts of wars that would shake up the status quo in a fun way.
Poll