I moved out of home a bit over a year ago, and to be honest, the weirdest thing (which I am still yet to get used to) is probably buying things. Not like bread and milk - my parents sent me out for that. It wasn't that odd an experience. Plus, I was expecting to have to buy that.
The weirdest things to buy are the things that always just kind of appeared back with mum and dad. Deodorant; shampoo; flour; sugar. Toilet paper! Those things that had always been in the pantry when you needed them aren't anymore.
You want a snack when you get home? Too bad. You and your housemate ate all the Jatz last night because you couldn't be bothered cooking dinner and now all you've got is some questionably edible dip in the fridge and a couple of sad schnitzels in the freezer, which you suppose you'll have to eat tonight. Maybe you'll have it with mashed potato, although you don't have any butter so it won't be very nice.
Moving out of home is probably 50% staying up until 3am watching Harry Potter and eating ice cream for breakfast, and 50% using tissues instead of toilet paper because you're too lazy to buy some, and putting cream in your Milo because you have some left over from baking scones but you're out of milk (actually, even if you aren't, cream is very good in Milo).
You realise why your parents have a plethora of those weird cards that get you points you can exchange for rewards when you go grocery shopping, but you're disappointed when they fail to yield results because you don't buy that much. You realise just how expensive shampoo really is. And seriously, that razor will last you a month, max. How can it cost that much? The mail doesn't appear on the bench anymore and it's really quite a distance to the mailbox from your front door. The bins get fuller and fuller because really there's no point going to the effort of opening the gate and dragging them to the kerb when they're only half full. You eat out of take away containers because you haven't washed the dishes. You resent every cent public transport zaps from your concession card and longingly wish you had a car, even though money will be even tighter when you do. At the beginning, you marveled over how cheap your rent was. Now you wonder why your landlady needs quite that much for just a bedroom. The bathrooms get dirtier and dirtier and cleaning them gets a more and more daunting task. Your bedroom hasn't been vacuumed in months because the floor is never tidy for long enough.
If you're thinking of moving out, all I can say is good luck, and for God's sake don't choose take away pizza over recharging your bus card. You'll really regret it when your paying the fare with scraps of change from your desk drawer.