TPM - what the hell? I think the opening shot of the Neimoideans needed to be in their own language with subtitles. That's what started it off poorly for me. It didn't feel like Star Wars until they landed on Tatooine. But the movie got gradually better for me the more times I watched it. I don't despise Jar Jar as much as I used to. He's the idiot I love to hate, which makes me love him all the more.
AOTC - There are some parts that irk me, the death of the fake Amidala for starters. After that, the movie got a lot better. I liked it more than TPM, but now I have more of an affinity for watching TPM, but I think AOTC is a better movie.
ROTS - Awesome flick, but such a downer. The battle droid voices irked me a lot. And Obi-wan should have never said "how'd this happen! We're smarter than this." Jedi are completely idiots, they'd get the funny force tingle to warn them. But this film I do enjoy.