Had Lucky Charms for the first time Monday night. Before that, the only cereal I've eaten with any regularity was Corn/Frosted Flakes, Fruit Loops, and Rice Krispies, but that's probably going to be added to the rotation.
I used to eat Captain Crunch (and the related media tie-in varients...Pacman, Donkey Kong, and Batman cereals), Fruity Pebbles, Kix, and Cheerios, but I never liked them that much. Except for Fruity Pebbles, which now inexplicably gives me a headache after eating.