As the former greatest troll to ever grace the internet (no longer a troll, God frowns upon trolls), I think I should answer this question for the OP.
A good troll is somebody who can do something that is so annoying, that sometimes people even though they know they're being trolled still fall into the trap of responding to the said troll.
Some examples of this include: Nolo King and is 'lawls', Jupiter's existence here, my Stronger Tomorrow campaign, and Cat's insults (
You just keep being over the top annoying and you may be able to reach my level of trolldom.
But if you overplay your hand, even as a troll you can troll yourself into Trollhood.