Admiral Woofington
Member
Even though they don't get much focus in the first season, I do appreciate how Lance gradually becomes less of a jackass to Keith and how they start to get on friendlier terms as the season progresses. There's no specific episode dedicated to it, but that growth is visible in the background for a number of episodes. Especially by the time they team up in the Balmera. When Lance is being snarky with Keith later on in the series, there's a bit more of a friendly nature to it than the pure jealousy Lance has early on. Even though this development is never in the forefront, the way it's presented makes it feel pretty natural.
As to Keith
I was also surprised on Keith not being petty, just competitive. Lance keeps egging him on which eventually brings out the competitve/rash side on him, but outside of that his interest is on improving the galaxy and being the best/most effective he can. Which is showing that him being the 'top pilot with personality issues' makes sense. He wasn't just a guy who was good a douche, he's a guy who works hard at what he does and also has a lot of talent, but can be prone to losing his head if egged on.