Absolutely loads of stuff.
Smacked us, I really hated them for this the most. There was no good reason for it and not something I've ever felt the need to do. I know that they regret it now my dad always had to be the authoritarian and for everyone to be afraid of him.
We never had any money and never had holidays or days out.
Only gave us fizzy pop to drink, never water. We are as much sweets sugary treats as we wanted.
Hardly had any nice toys or clothes, everything was hand me downs.
Oddly though, despite my dad being a bit of a bully, in many ways we'd be allowed too much say. I could watch what I wanted on tv even if it was quite adult themed. We were never forced to eat things we didn't like. I was allowed to make quite important decisions that could affect my health like not letting the dentist look at my teeth, not wearing my glasses.
One thing I do say though is that I've turned out ok, I'm a good person. Dh had quite a middle class privileged upbringing, but some of the things his parents did shock me. For example going on holiday and leaving the dc in a caravan or apartment while the adults went out drinking.
My conclusion is that all parents make mistakes. A lot of it is if its time/generation.
I was chatting with my eldest yesterday and he was telling my about things that happened at his primary school and how terrible it was. Also recalling an activity he did with cubs and he was bordering on why did I make him go. I reminded him that he loved going and always wanted to go.
But I wonder what our children will be shocked at that we do or how they will remember things.