I live in Prince William Co. in VA. A Maryland CCW comes free with the winning lottery ticket you purchased on March 32nd. Other than guns:
I'd rather have a daily root canal than have to cross the Potomic for a daily commute. One accident in the wrong spot and you've got a 4 hour commute on your hands, honestly that's not an exaggeration. It happens every one to two years. We have the worst traffic in the nation. If you work in VA, live in VA. Going from MD into VA, the only way to avoid the Beltway and cross over into VA is by going thru DC. Drivers here in all areas are going to be among the most aggressive you've ever shared a road with. In my experience only Boston was worse. Unless you're working off rush hour hours, or can commute using Metro (our subway system) you will be spending a lot of time in your car, there's just no way around it.
MD is a nanny state and is rapidly becoming Massachusetts II when it comes to taxes. MD and DC are taxing themselves out of the competition for new businesses, it's just cheaper to do business in VA. The last gubernatorial election was won by a virtual unknown from 'the other' party largely because of this. As a general rule, your personal taxes will be lower in VA.
If you want to live in Prince George's Co, mug and assault yourself now and beat the rush.
PEPCO is the main electric company for MD and DC, Dominion is VA's. Although they've improved somewhat, the Amish wouldn't want to deal with PEPCO's frequent outages. It's gotten much better than it used to be, but PEPCO is usually rated one of the worst in the country. Investing is infrastructure wasn't a priority until the complaints got to loud to ignore.
There are some good things about Maryland, like the areas not in the DC or Baltimore area. I'm a Texan who's lived in MA, OK, Towson MD and VA, and after TX, VA is the best state I've lived in. Our state government isn't as dysfunctional as most states, usually. We weathered the resession better than most. But overall the DC Metro area isn't cheap, you'll want to look into that very carefully.