Marcella's is still one of my favorite Columbus restaurants. Excellent Italian food, small plates to share, reasonable prices, and very lively. Reservations accepted.
I love Bakersfield but, if this is your choice, arrive before 6:45. The place gets a ton of guests and they don't take reservations.
The Sycamore is a brand new restaurant that is tucked away on a residential street in German Village. Very different feel from the lively Short North. Easily the best food I have had this year. Within probably five blocks is Curio, a cozy bar featuring classic cocktails. Fair warning, their drinks are all in the $10-15 range, but it is a nice spot for a nightcap.
My favorite place is Tasi, a small restaurant off of High Street in the Short North. Poached eggs on black bean cakes are incredible. It is right around the corner from Homage if you need any good Buckeye apparel.
I haven't been for breakfast yet, but The Pearl is another option and is one of the few in town that serves chicken and waffles.