I used to all the time, but these days I tend to stick to Howard County and sometimes DC. My favorites in Baltimore are Koco's and Pappas for crabcakes (but I'm favoring Pappas these days), Hamilton Tavern for burgers, and I loved the pasta at Chingale. I used to go to Pazo all the time, but haven't been there in a number of years. Also really like the tapas at Adela. Been meaning to go to Peter's Inn for a while now, but have never really gotten there.
Stand out meal lately has been at Food Market in Hampden. And I keep waiting for Paulie Gee's pizza to open, but their ovens were damaged in transit this summer. I continue to stalk their facebook page.