I really love that Arcanist/SCH/SMN's auto attacks are done with the book. Like, you don't make it glow or energize it or anything. You just put all your STR into it, and BOOK BONK the boss.

I'm completely in love with the Skyslipper mount.

Zone music that's continuous, so ever since Heavensward, there's been various zones and locales that I sometimes go to, just to afk and listen to the looping music.

Most currently I find the Emerald weapon fight second phase music to be hypnotic.