This American, when confronted with bacon in an Irish breakfast for the first time, felt enormously shortchanged. That's ham, not bacon! I do like it, but not when I'm craving bacon.
In the end, though, I really can't eat a "real" breakfast at breakfast time. Most of the time, I have a bagel or a bowl of cereal or similar and call it good. When I do eat eggs and hash browns and so forth, it can mess up my eating schedule for the rest of the day. Because of that, I usually have it for brunch (and then have an early dinner) or just eat it at lunch time after having something like toast when I first wake up.
My personal favorites are good biscuits and sausage gravy (which can be sort of a hit-or-miss dish even in the south, but definitely outside of it), hash browns, pancakes, Belgian waffles (none of those other kind without the deep pockets), eggs (fried or poached in a restaurant, scrambled if I'm at home), and bacon or sausage. I never eat all of that in one meal, though.
I have never cared for grits, like even a little bit. I'm a born and bred southerner, but give me hash browns any day. I really don't much like home fries, either. I did discover the best hash browns in the whole world at my favorite breakfast place, though -- stuffed hash browns. Basically, it's two layers of hash browns sandwiched around sour cream, cheese, and chopped bacon. It's like a baked potato made of hash browns. It is AWESOME. My husband and I will sometimes split a steak-and-eggs breakfast that has 3 eggs and the stuffed hash browns (and pancakes) from this place. I can't imagine one person eating all of that, since we both always leave full, and it's the cheapest breakfast going.
I don't really drink juice, so my breakfast drink of choice is often diet soda.
I like coffee, but I don't always like drinking the coffee available in restaurants, because I don't think it tastes very good. Plus, I can't always get just plain milk to put in it -- some places (particularly breakfast diner type places) really only have the little mini-moo type things, and I really dislike those.