Falcon02
General
The only thing Maryland has in common with the south is the fact that it was a former slave state and a former segregated state, other then that there's nothing.
Honestly I feel Maryland is a sort of Transitional State between North and South.
Large parts of Maryland have a bit more Northern Feel (Central Maryland, Baltimore/Washington Metro Area), Large parts of Maryland have a bit more Southern Fell (Southern Maryland, Eastern Shore).
I had a teacher once who had some friends from the South that thought her "Northern Accent" was so funny sounding... She also apparently had some Northern friends that complimented her on her "Southern Accent"
Maryland isn't really "South" nor is it really "North" it's a combination of both... which is why Mid-Atlantic is probably the most accurate term. However that does include Virginia, which is traditionally considered "South" but then again... "Northern Virginia" isn't very "Southern" either by culture/feel.
The History of Mason-Dixon being the line between North and South I think is routed in the Slavery compromises pre-civil war... where a new state north of the line would be a "Free State" and South of the Line would be a "Slave State"