Having the heating on before it's got to the point where you're wearing two jumpers and a coat and are still cold. I vividly remember having to argue to have the heating put on in January when my hands had gone so numb I could no longer write my homework.
Having more than one pair of shoes - until I was about 11, I had School Shoes and nothing else, not even trainers, and School Shoes were to suffice for every activity. I dreamed of owning trainers, or jelly shoes with heels like my best friend from primary school!
Not buying clothes from charity shops.
Dairy products - DM was a vegan for years, before it was cool. She did not have the culinary skills to make it a pleasant experience.
Buying coffee when out of the house
Halloween - "an American import" and thus banned. My dearest wish every October was to go trick or treating. I've never managed to fulfil it as you can't very well go as an adult with no children...
Takeaway deliveries - to this day, on the very rare occasions that DF gets a takeaway he'd still rather drive to the takeaway and wait than have it delivered, even when the delivery charge is less than the mileage.
Washing towels - DF harboured a bizarre belief that if you ever washed towels they lost all their absorbency. You can imagine the state of them after a few months. By the age of 12 I saved up my pocket money, went to primark and bought a set that I could do with as I pleased.