HM is probably my number 2, but I prefer WDW's to DL's but Hatbox makes it closer to a tie than it was before he materialized. Mystic is definitely my favorite attraction worldwide, hands down. It feels classic even though it's new, and the effects are marvelous. It's better than Hunny Hunt at TDL, which is also a great attraction. Mystic feels like a culmination of decades of work, and you can feel the love for the craft when you ride it.
While I respect POTC (and DL's is the best) it's never been my favorite. I enjoy it, but the theme doesn't really appeal to me so it wouldn't rank highly on my list. I can objectively look at it as a towering achievement, but it's just not my fave.
Of course, Mystic dethroned my previous all time favorite attraction, Heimlich's Chew Chew Train.