It's funny how quickly things become second nature. When I first moved to Sweden it took a while to get used to this after a lifetime of stomping around UK houses with my boots on. But before long I found it felt more and more natural, and found myself looking disapprovingly and tut-tutting at my friends when I went back to the UK to find everyone else in their normal habits.
Nowadays, having been married to a Swede for 5 years, it wouldn't occur to me to do anything else. Which is a bit of a problem sometimes now that we've moved back to the UK where the stereotype about cold houses is, generally, pretty much true. Luckily my wife's grandmother left a legacy of a lifetime supply of home-knitted woolly socks.
On a connected note, the other thing that I used to love and now can't stand is carpets. I used to think of them as cosy, welcoming and comfortable. Now, after those nice fresh Swedish wooden floors, they just strike me as rather dusty and a real pain to clean.
Ah well, next I'll start thinking it's strange to have two separate taps in the bathroom...