We live quite comfortably in an apartment (house? row of small houses attached by the side walls) of about 550 sq ft, two adults and our 13 yr. old, and if we didn't have kids or if I were single it would be no problem to live in a smaller space. But, and that's a big but! we have a small garden front and back, a veranda that opens directly from our living room, and a terrace that opens from the kitchen, that give extra living space in summer and storage space for our two kayaks. Plus an outdoor shed with room for bikes and skis, and a crawl attic for all the rest of our stuff.
I don't mind living compactly, but as long as we have such gear-craving hobbies we use all the storage space we can get.
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett