6. Booster finally joins the league
Justice League #4 In Boosters' own series he was near desperate to join the league. Sure he was more than a little boastful when Max offered him a spot but once he realizes the team had nothing to do with it? Booster deflates and sadly walks off. As he prepares a statement the Royal Flush Gang attacks. Booster goes after them and single handedly takes down most of the team. Batman takes interest in the battle ordering no one to step in. Once Booster finds out he's being watched he's far more nervous than he was with Superman. But Batman shows that he can judge a hero better than the Man of Steel. Not only does Batman praise Booster but he cracks a smile. This is the start of Batmans' soft spot for Booster and the heart of the team, Blue and Gold.
As Ace takes apart the league Booster joins forces with Ted for the first time. Ted realizes he can add more to the team and Boosters' shy but excited fanboy self gets a chance to shine. This story really is about the underdog who gets to live out his dream and have one of his heroes see him as an equal. (It's not the first time Booster met Batman though.)