P.M.
I absolutely love my Black & Decker electric mower. It's reliable, starts instantly, has enough power to handle rough orchard grass (not all on one charge, though). It doesn't need a tuneup every spring – I just sharpen the blade a couple of times a year. And it's QUIET, and doesn't give off noxious fumes. It's about 6 years old and has never needed any servicing, in spite of hard use.
I have a couple of friends with smaller city lots who love their old-fashioned push-reel mowers. Great little machines, and great exercise.