Awesome Art: The animation, especially for the fight sequences of episodes 2 and 3, have been heavily lauded by viewers and commentators for their incredible fluidity and dynamic motion.
Awesome Music: The theme that plays when Vegeta unleashes his ultimate attack, Royal Spear (of which the theme shares its name), on Broly is nothing short of epic.
Awesomeness Withdrawal: This happens for many of the series' viewers due to the episodes each taking well over a year to make. Not helping matters is Toei Animation's copyright strike the third episode, putting the series on hiatus.
Character Rerailment: The series returns Z-Broly back to his original personality in debut as a sadistic, coherent villain before he was flanderized into a dumb brute that could only shout "Kakarot!".
Uub's fight with Corpio, showing off his mastery of his Majin abilities. Even when Corpio gets the drop on him, he casually regenerates the damage.
Vegeta vs. Broly:
Firstly, Vegeta actually manages to match Broly at the start of their fight, despite both being Super Saiyan 3! Considering what Broly did to him last time they fought, that really shows how strong Vegeta is now.
Then, when Broly starts kicking his ass and wrecks him, Vegeta unfurls his tail, catches Broly's punch, and knocks him back. He then transforms into Super Saiyan 4 and effortlessly rag-dolls Broly! This is the Legendary Super Saiyan (as a Super Saiyan 3 no less), and Vegeta kicks his ass!
Not to be outdone, Broly's still one of the deadliest enemies the Z Fighters have ever faced. His power keeps escalating to the point where Vegeta does what he can to end the fight as fast as possible. Even as a Super Saiyan 4, Vegeta is still extremely wary of what Broly can do.
Two words: ROYAL SPEAR!! Vegeta's final attack that defeats Broly is a glorious driving attack that slams his opponent down with a destructive burst of energy that takes the shape of the Saiyan Royal Family's crest.
when Vegeta unleashes his ultimate attack, Royal Spear (of which the theme shares its name), on Broly is nothing short of epic.