Walkable to Ballston, Pupatella, new Safeway development, ATS, right by bike trail. Not sure about sense of community. I believe it's part of Bluemont, but this particular street looks a little isolated.
http://www.redfin.com/VA/Arlington/738-N-Buchanan-St-22203/home/11242417
Very close to Washington-Lee HS. Ballston. We had friends over here that liked the neighborhood.
http://www.redfin.com/VA/Arlington/1324-N-Stafford-St-22201/home/49671746
This one is cute (aside from weird fridge selection). Further walk to Ballston, but you have all of those Cherrydale shops (hardware store, yoga, tea shop, etc.).
http://www.redfin.com/VA/Arlington/1908-N-Taylor-St-22207/home/11233538
I think this would be walkable to both EFC Metro and Westover (grocery store, beer garden, hardware store, Lost Dog, etc.). Great community there.
http://www.redfin.com/VA/Arlington/6101-18th-Rd-N-22205/home/11239901
A little further from Westover, still near EFC metro. We have friends at Tuckahoe and they love it.
http://www.redfin.com/VA/Arlington/6105-22nd-St-N-22205/home/11238846
This one is in a great location - Lyon Park right by a nice playground. There are some cosmetic things that are a little funny, but it's worth a look IMO just based on location. Great neighborhood - tons of kids and friendly neighbors. Hopefully that espresso machine conveys.
http://www.redfin.com/VA/Arlington/3132-8th-St-N-22201/home/11256169
I think they would all offer a bit of what you are looking for. I would just focus your search based on price and distance/walk time to Metro and see what pops up.