Shout out for Somerville, MA -- right next to Cambridge, 5 minutes from Boston.
If you live in the commuter rail yard, sure :)
Anybody planning on moving to Somerville should be prepared for housing costs to take a big jump once the green line extension is done, though. An improvement on transport options, but lots of places that are just far enough from the red line to be cheap are suddenly going to be right on the green line.