I gave away my car three-four years ago and ride a bike 24/7/365, rain, snow, whatever.
For the first two years I tried a geared cyclocross bike, but it didn't really work for the worst weather.
It would freeze up, and it put too much of my weight on my hands and handlebars, which in turn put too much weight on my front wheel.
Last year I decided to go fixed all the way and I built up a winter fixed gear bike on a Surly Karate Monkey frame set.
The curved seat tube on this frame puts the rear wheel more under the saddle, which lightens up the front wheel considerably.
Having a light front wheel matters when one hits something in the snow in the dark.
I ride with a super short stem and bullhorn handlebars, with bar end brake levers that connect to cantilever brakes.
This frame set will accept the fattest tires imaginable, from Schwalbe Big Apple 3.25" 29'rs to Nokian 294 stud knobbies.
Nothing stops me.
I ride when nothing moves except me and the snow plows.
In good weather, I zip around town with the greatest of ease.
Try a google image search on Surly Karate Monkey
and see how other people have set up their Karate Monkeys.
The frame set will accept any configuration, from fixed to SS, to geared hub, to derailleur multi-gear; and cantilever brakes, disc brakes, or no brakes.
It will also accept front suspension, but I like my bikes simple.
I've discovered if it CAN
freeze, it WILL
Anyway, I love the bike on the street, and I see it as less work than a multi-gear and not as more (I ride at 60 gear inches).