60% of Episode I. It was intended as something more light-hearted and it shows, being set in a time when everything is pretty okay at the start, no galactic wars or anything. 9-year old Anakin is a lot more fun than teen Anakin, and Liam Neeson is probably the best acting job in the trilogy.
The finale was particularly impressive. A shootout in the palace's aesthetically stunning grand hall, a lightsaber duel, a ground war and a space battle all simultaneously going on at once to the tune of the excellent Duel of the Fates, each of which reaches a near defeat before turning around at the last second. Very self-contained and clean, just like A New Hope.