should check out the Richard Donner-cut of Superman II if you have only seen the original theatrical release of Richard Lester's Superman II. Especially if you thought Lester's version was excessively campy and too much of a departure from the feel of the first film.
"The result is stunning — and an entirely different movie. Among the many benefits are Superman’s conversation with his father (Brando) in the Fortress of Solitude, which clarifies how he got his powers back, and romantic scenes at Niagara Falls, which creatively incorporate Margot Kidder’s original screen test. The most drastic difference, however, is tonal: Donner’s cut is epic. One glaring example is the final fight scene, which, thankfully, leaves out Superman using the “S” on his costume as a giant cellophane weapon."