Robin is a natural-born leader. In DC Comics and other incarnations, Robin is even toned and playful despite some outbursts of rage, such as when he learns of his parents' killer and when he eventually stops working as Batman's sidekick (a situation that is mentioned in a roundabout way in the episode Go!
). However, in this series, Robin is closer to Batman; serious, stern, strict and obsessed with hunting down criminals, which is most prominently displayed in the first season.
Out of all the villains the team has faced, the one that is most hated is Slade. Robin will stop at nothing to defeat Slade. Robin insists that the two are nothing alike, despite Slade's claims to the contrary. Several encounters with him have lead dangerously close to causing rifts between Robin and his friends. Robin must put aside his fixation on Slade and put more trust in his teammates if he wishes to resolve the threat. Another flaw Robin has is he is competitive and still a bit immature but, despite his struggles, Robin has time and again proven to be a great leader. He cares for all of his friends deeply, and will fight to the finish to defend them.
Robin is a bit of a loner. Beast Boy and Cyborg hang around with each other more than him and Robin tends to be very independent. He insists on doing everything himself such as being Slade's apprentice and battling Red X
. In the episode Go!
when the Titans first met, Beast Boy (who implied that he was a loner and hasn't had anybody to talk to since he left the Doom Patrol) wanted to befriend everybody, Robin made it clear that he doesn't want to be part of a team but eventually does form the Titans. Throughout the series, the team and everybody in it is very important to Robin.
He cares deeply about each of his friends but for Starfire it is shown that Robin has romantic feelings for her. Everyone on the team can very well see their feelings for each other including the villains but neither of them admitted their feelings until the movie Teen Titans: Trouble in Tokyo
where they finally confess their true feelings for each other and have their first true kiss.