TAS did a good job with the character.
I personally thought the series went downhill once he joined in
He didnt reappear for quite some time after Christmas with Joker
I'm not opposed to Robin in animations and comics. Many things that work there don't in movies though.
For me it is Bat-girl. One side-kick is enough, but two? Just far too over the top. I could only tolerate her in TAS/New Adventures b/c she was only in it sparsely.