Here's the list of Events I can think of from when I was chief that people loved.
Shuffleboard
Bomberpulse
Bulldog
Tag
Chance
Backstab
CTF
Stopandgo (One of my favorites)
Bash (One of my favorites)
and pretty much any other PK event they could remember.
My favorites were pretty much all events made by Zheak for they were creative and above in quality versus most events you see on Graal anymore.
Any I really did forget to mention are usually just ones players usually preferred for the sake of just being good at it themselves (Just like how I am with stopandgo
)
Hope this helps a bit.