One thing the cold makes me appreciate is a heated steering wheel. Girlfriend's car has one, along with heated seats; my own car has heated seats only. Even in a sports car, it's a luxury I'd really like; I enjoy going for an early morning drive, but find gloves a bit cumbersome when driving.
Otherwise, I don't really find defrosting the car much of an issue. Leave a bottle of water on a radiator near the front door overnight. Go out, start engine, turn on heated rear screen, pour water from the bottle over the windscreen, immediately run the wipers - done. No standing around scraping, no de-icing chemicals, and ultimately you can drive off quicker which is generally better for the engine.