Dickie Brenans, Mr B's, Arnauds, Tommys, NOLA are some good downtown places. (well Tommys is in warehouse district)
Apple Barrel is casual place with good food downtown on Frenchman st.
Breakfast downtown great spot is Stanleys right in Jackson Square looking at St. Louis Cathedral. Great service Greta food.
Uptown casual spots, Parasols has great poboys and so does Traceys which is right down the street. Right off of Magazine St.
Ingnatius has great plate food at lunch, also on Magazine st Uptown.
Great breakfast spots uptown are Camelia grill and if line is too long go right around the corner to a spot named Refuel. Both great.
Those are at the corner of where Carrolton and St Charles intersect.
Ask anyone in town and they will know where those spots are.
Have fun, it's a great city.