Best/Worst Set released so far?

In your own opinion: What is the Best/Worst set released so far?

Best set - Duelist Alliance, Simply because of Shaddolls & BA's

I was out of the game between 2006 - mid 2014 so dont really know that many lol

Best: Phantom Darkness

It introduced so many awesome power cards, that in my opinion makes this the best set.

I was out from early 2009 till mid 2014 so yeah.. I may be biased towards old sets x3

Worst: Legend of Blue-Eyes White Dragon

So many useless normals...
Oh, and terrible spells and traps.