Necrons are the only army I have.
Granted, I've been playing since 2nd Edition, and have played every army GW has ever introduced to this game at least twice.
This one, is the only one I have. Aside from a few odd ball models I've painted for ****s & giggles. As soon as I get the battle bots sold. I'm hanging up the dice for awhile. With the exception of maybe Warmachine.