Awwwwwwwwwww!!!!!!!! My very, very favorite composer of all time; hence, my screen-name. I had a professor who felt Vivaldi's compositions were replete with repetition until I told him that he wasn't listening. He did learn to listen.
Dear Concerto in D,
I agree with you. There is a certain Vivaldi sound, but I don't find his works repetitious in the least.
sitetest