Hey I own a 7.2 and I find myself riding in one gear most of the time. When I face a hill, I just stay in that gear and climb it, I hardly ever shift gears. SOMETIMES I shift to a lower gear if I'm having an off day, or lazy.
With that being said, I recently purchased a trek Soho S, single speed....I LOVE IT. Its really maintenance free, the bike is really light. I took it on a hill the other day and I find it was easier to climb up hill then on my 7.2...I guess its because there no derailer so the bike accelerates faster and its easier to pedal on the same gear ratio.