I always loved how Starfire and Cyborg had a big brother-little sister relationship. How they could always be brutally honest and rawly emotional with each other, in a way they couldn't be with the others. It was one of my favorite parts of the show. I miss that junk. :'(
What Teen Titan has taught me: They forgot: to not judge based on looks (starfire changes looks into fully tamaranian), to never give up on love (starfire and robin), to forgive (starfire and her sister), etc.