Well, part of the decision is whether to eat breakfast foods, or lunch/dinner foods. When I'm looking for breakfast (or brunch), I'm looking for breakfast specialty dishes, rather than an everyday lunch/dinner menu. Fortunately, we have quite a few restaurants that specialize in serving breakfast all week long as well as weekends, and many of them are very good indeed.
In the Loop itself, I like
Atwood Cafe for weekday breakfast and weekend brunch. But it's a bit pricey - not surprising for a restaurant in an upscale hotel.
Another place you can go in the Loop is
Heaven on Seven, whose Wabash location is open for breakfast on Saturdays (closed Sundays) and also serves breakfast during the week, but starting at 9 am. I had read about their French toast, which is deep fried, so I went there to try it; I've had some good fried versions of French toast, but I thought theirs was rather dry.
Of course, the Loop itself is surrounded by adjacent neighborhoods which offer many many more choices for breakfast. Including, starting with the South Loop and proceeding clockwise...
Bongo Room, in the South Loop, is terrific for those who enjoy sweeter dishes for breakfast. They specialize in pancakes topped with sauce, such as their pretzel pancakes with white chocolate caramel sauce. I think Bongo Room is fantastic; it's easily my favorite breakfast specialty restaurant in the areas comprising the greater downtown Chicago.
Yolk has several locations, including the South Loop, River North, and River East. I'm not a fan; I find it to be ordinary breakfast fare, eggs and pancakes and such, competently prepared but nothing all that unusual.
I tried
Waffles last week and I was mostly disappointed. The cheddar waffle with short rib consisted of a tasteless waffle accompanied by a nice portion of very good short rib. Their Liege waffle was undercooked and gummy in the middle. (Go to
Baladoche in Lincoln Park for a good one.) And their hot chocolate flight was overpriced, three tiny portions of mediocre bland hot chocolate with powdered flavorings that didn't do anything to help. The seating (since it was questioned above) varies; there are backless barstools at the bar, some of the tables have backless benches, while others have standard chairs with backs that are just fine.
A good place in the South Loop that no one knows about is
Little Branch Cafe, on the ground floor of a residential high-rise. It looks like a coffeehouse but they cook excellent breakfast foods to order.
Moving on to the West Loop, I'm not a fan of
Lou Mitchell's, near Union Station. It's been there forever, it's convenient for commuters, but it's just ordinary diner food. Meh.
I like
Meli Cafe, which (as noted above) has one location in Greek Town and another in River North. They have a terrific selection of different kinds of French toast, and it's pretty good.
Continuing in River North,
XOCO has a nice selection of hot chocolates but the food menu at breakfast is very limited (although their fresh churros are good). To me, it's a good place for a morning snack, rather than a complete breakfast.
I really like the
Original Pancake House, the nationwide chain that has Chicago locations including the Gold Coast (on Bellevue) and Lincoln Park. The six locations of their
Walker Brothers take this franchise to a supremely high level of quality, and other Chicago locations seem to offer a higher and more consistent level of quality than in many of the other locations across the country, possibly because of what Walker Brothers offers. Their big puffed-up cinnamony apple pancake is great, and I love their omelets and crepe dishes too.
Another place I like going for breakfast is the cafe in the rear of
Fox & Obel, where they have a menu of breakfast specialties they prepare to order. I am especially fond of their Cobb omelet. I also love their rich cinnamon swirl rolls, which are usually available at the bakery counter as well as the cafe.
I have heard good things about
LB Bistro in the Sheraton, which is run by a two-time World Pastry Chef Champion, but I have yet to go there.
I'll also add that some of our best breakfast specialty restaurants are outside the Loop. My favorites include Walker Brothers (mentioned above) in the north and northwest suburbs, Bongo Room (mentioned above) which has a second location in Wicker Park,
M. Henry in Andersonville and
M. Henrietta in Edgewater,
Southport Grocery in Lakeview, and
Jam which recently moved to Logan Square.