I started living by myself almost 7 years ago. At first of course it was just a big mess, junk food, no ironing, random sleep... Well, let's say that it was funny, but after a while I spontaneously calmed down and changed approach.
Now I'm still messy and ironless (I swear I have nothing to do with that, there's no iron board in the flat and it's not so operative to iron on the kitchen table...) but i slowly started having my own little habits that always make my day.
Some of them are probably common to many other people, some other not and I had lot of laughing moments with my (several!!!) flatmates about them!