I ride a '99 Kawasaki Concours. Granted, it's not quite slim enough for easy lane-splitting. But it's got good weather protection which, living in Eastern Colorado, I appreciate. Two years ago I rode 360 days out of the 366 (leap year). I won't ride if freezing precipitation is predicted, but have ridden in temperatures down to about 12-13 degrees F.
I've got a Givi trunk in addition to the Connie's side bags. My right bag has tools, spares, and foul weather gear (Frogg Toggs, cold-weather gloves). That leaves the trunk for my laptop, the left bag for whatever (and I carry quite a bit of "whatever" back and forth from work). My personal best in terms of that "bag or two of groceries" was $273 worth of groceries in the left bag and the Givi (which wouldn't close) and a 25# bag of ice bungeed to the pillion.
Not only is it economically and ecologically more sound than my Buick, but it makes me feel good and has helped me establish an identity around town -- I'm the United Methodist minister who rides the motorcycle. I've even used it to lead funeral processions while wearing my black pulpit robe and my liturgical stole. I don't do that unless the family requests it, but about six families have asked me to lead the procession in the last three or four years. They always want a picture, too.