Is it worth watching?

The short answer is

YES !

Do you want to play some dragon ball z games

YES !

Well, lets go through DBZ's history

DBZ debut with its series Dragon Ball but was launched into super stardom with its sequel series Dragon ball Z. Which later became Dragon Ball "Z" Kai which was just a non-filler version with HQ and improved 21st century graphics.

Before Dragon ball "Z" Kai, GT and AF popped up however, they are not part of the original universe, it was more a "fan-made" alterative universal, kind of like DC Universe stories.

The series that follows after Kai is Super where it shoots our legendary saiyans into the Lands of Gods.

So, who wants to see freiza actually gets his ass whopped?

Since, it took forever in the series, in both Z and Super, why not play some dbz games Where you can be paired against the enemies or justice straight away.