I don't hate any of the prequels. I enjoy Episode I, aside from Jar Jar. I don't care for Episode II all that much anymore, if only because it's just kinda boring. I love Episode III and it's by far the most watched prequel for me!
The only one that comes close to the level of greatness and nostalgia I feel for the OT is Episode III. No movie in the last decade had me more pumped the entire time.