It's sort of gimmicky I guess, but he has (imo) the best level 2 ganks in the game. There's some counterplay, but if the other team doesn't know what jungle Twitch does, you can easily get very fed and win your lanes for your team.
I used to before Twitch got reworked, but there's just not enough early game power on his E to clear at a decent speed anymore. --- Remember remember... the 30th of November. The day that heroes could not save the world. ~In remembrance of City of Heroes.