My personal favorite would have to be the Halloween II skull pumpkin my wife painted for me. Second to that, I’d say my Haddonfield Memorial Hospital mug.Mug. Do you have a personal favorite of your own?
I don’t really have a personal favorite but I really like that poster mug you have. Fifth one from the left 
I have the 3rd and fifth on the left for my Halloween mugs. I prefer the 5th one on the left.
3rd one to the right Halloween 2 I think looks so freaking awesome
Spirit Halloween usually has some new ones every year. That’s where I usually get a few. There & Mercari. Mercari does great custom mugs.