I actually find TPM most enjoyable. I think Lucas put a lot more effort into the script than he did with the other two and was a little surprised when it bombed.
I know what you meant. it bombed with the critics and most part of the fans.
But TPM is the most enjoyable of the three prequels movie to me. Better visual effects, better designs of ships (Naboo starfighter looks awesome) and characters (Sebulba, Watto, battle droids for example).
Also we have a cool villain (Darth maul) and pod race.