When the missus' out with the car I commute with our 650GS. I MUCH prefer this over the highway rides, but it's not my favourite riding. Wouldn't be tempted to just go for a spin, when I can go in the woods instead.
Gets you all alive, with all senses sharp, and I love zigzagging between the angry buggers lining up in the traffic jams.
Also, when commuting by car I've to wake up at least half an hour earlier.....

One thing I hate is them sorry bastards who can't live with bikes being faster and block the way on purpose.