funny because even when I strictly ran walkbehinds I still had 3 wheels. always ran the exmark standon with my exmark mowers and its a 1 wheel design.
guess in general I'm more concerned with the overal appearance of the mowing job. are things trimmed neatly, is it an even cut, no scalp marks, no turf damage, no clumps, nice sharp edge, sidewalks and walkways blown off. if I get nice sharp looking stripes in all that, great, if not oh well.