I'm still not completely sure how to earn them, I seem to have earned two or three so far , but there are others clearly , that I'd love to know how to get, like the trickster one

I have about three, but from my understanding they are earned during festivals by completing certain tasks. If you check you fall fest task book, it should tell you what you have to do to earn the title.

A lot of titles are from festivals, but not all of them... like, there's one you get for beating Dungeon of the Forsaken for the first time.

Some are from official forum games - those will usually be listed in the "prizes" section of the forum.

There are a few that you get from the Arena...

A bunch are from making exclusive pets during fests. Or stuff like giving out candy in ToT, winning in Snow Wars, helping other people's brews/plants...

I don't remember how to get Trickster. I have it, but I don't remember how I got it... sorry :c

I could be wrong but Trickster might have been from the original ToT event. The one you could actually trick players. It was incredibly unpopular and caused a lot of negative feelings so ToTing got revamped to what it is now.

Scratch that. Its in the Fall Festival overview. Trick or Treat 500 times as a visitor.