I actually liked quite a lot about Episode 1. To my 13 year old mind, it had much that was cool about Star Wars at that time. It had lightsaber battles, some strange new worlds, a prophecy, and some intrigue.
Episode 2. Across the Stars. And...Hmm. I'll get back to you on that.
Episode 3. 3 scenes. First, the capital ship crashing down on Coruscant. That was what Star Wars should be. Adventure, excitement, destruction on a massive scale, everything. Second, Padme's Ruminations scene. Silence is golden. Third, the first minute of the Order 66 scene. During that sequence, up to and including the reaction of Yoda, you feel that this is what the prequels have built up to for three movies. After that, the sequence drags on, with George having fun with his computers.