DH eats cereal for breakfast every single morning, and for the first 10 years we lived together (give or take), that cereal was Cheerios. Traditional, old-fashioned Cheerios in the bright yellow box, and it had to be the real thing; no store brand knock-offs. He's expanded his palate and now enjoys Raisin Bran, Life, Wheaties, Crispix, Chex, Grape Nuts, Cheerios, Honey Nut Cheerios, and Multigrain Cheerios, but his new ultimate all-time favorite is Shredded Wheat 'n Bran. Except for the regular Cheerios, Raisin Bran (Kellogg's only) and Shredded Wheat n' Bran, he'll eat both the "big name" and store brand versions.
Me? I try to stay away from cereal because of the carbs, although I just started working out in the early evenings (around 6pm, only time it fits the schedule) and find I am not hungry when I get home. However, around 9pm when I am finally hungry, I've had a bowl of Raisin Bran instead of supper. I know this isn't good, but I'm working on it. RIght now, I am more focused on establishing the regular exercise routine than anything else. If I were to become a regular cereal eater, it would be ugly, because my favorites are Sugar Smacks, Lucky Charms, Froot Loops, Apple Jacks, and Cocoa Krispies. I just love the junk cereals, and can eat a box in a day or two, which is EXACTLY why I don't buy any of them! HOWEVER... when DD and I take a road trip, our favorite "car food" is brown-sugar frosted mini-wheats. I put the entire box in a large ziplock bag and it stays in the front seat with us, ready for snacking at any time!