Went with Gen VII in the end. Marowak, Mimikyu, and Decidueye are just too good. Marshadow is one of the better mythicals IMO and with an interesting typing. Blacephalon is one scary mfer but I respect what it has going on for it.
Aegislash and Chandelure are also really, really good and I used them back in their respective gens but they can't carry their generation. I'm just 'okay' with their genmates.
Also I'm not voting for anything with Hoopa in it.