What really bothers me the most about the prequels isn’t the fancy aesthetics, but the fact that the Galaxy appears to be way more advanced technologically 30-20 years before the OT.
Although TPM is visually the most Star Wars-sy looking of the prequels because it was the only one shot on film and used real sets and more practical effects, story-wise TPM is all over the place. AOTC’s only saving grace for me is the lightsaber duel between Yoda and Dooku (yes I enjoy that scene, sue me).
ROTS is most definitely the best of the prequels in terms of overall story and character (I still dislike the whole saving Padmé as Anakin’s reason for turning to the Dark Side), and the I enjoy the most. I also think it’s only one of the prequels that really feeds into the OT plot-wise (if you ignore TPM and AOTC you won’t really miss out on anything).

BTW, porn star Lexi Belle is a huge SW fan and considers AOTC her favourite of the franchise, so make of that what you will.