Most of my reviews this site are on places like Naha (probably my favorite), Les Nomades, and places of that nature.
However, I thought I would mention some good comfort food. My neighborhood (Streeterville) place is D4 on Grand, between McClurg and Fairbanks. The food obviously does not compare to places like Naha. I was in Wednesday of this week for a beer and a quick meal with my wife and our twins (the place is pretty child friendly for what is basically an Irish bar). I had the Shepherd's Pie and two different beers. The Shepherd's Pie really met my definition of comfort food. Basically, mashed potatoes, meat, and vegetables mixed on a plate. Is it Naha? No way. But it was very good and I thought worthy of mention.
One more note about the place -- it is one of the few places that really know how to pour a Guinness. It takes about five minutes and comes out right.