Harryhausen I was that child, not allowed sweets except very rarely, lots of homemade yoghurt/bread, never ever allowed the devil's (white) bread, beansprouts and so on. Also not allowed to watch all the same TV programmes as my peers.
You are right- I like children's sweets now in my 40's and I watch a lot of crap telly.
I am not sure why, I am not consciously doing it to be rebellious- I just love children's sweets as I didn't have them very often (from about 7/8 I was allowed them once a week) but I salivate at the thought of them, and eat a lot of Haribo in preference to adult chocolate/goods.
I love crap telly and have it on a lot, all the time. I am not a conscious consumer- I just find it reassuring, and I was pretty excluded by not being able to join in about say things like when Bucks Fizz won the Eurovision Song Contest and I'd never heard of them!
By all means bring your children up as you like, but the idea that restricting sugar will make a jot of difference to their adult tastes is wrong, my aunt was even more hardcore about it and asked everyone not to give her children any sweets- her children are just like me, normal, slightly overweight people. Not watching TV doesn't make you creative, interesting, discerning unless you were heading in that direction anyway.