I hate new builds. They have no character. I went to look at one - it was like a glorified box. Plus the noise from the other houses is horrid. My Nain lives in a fairly new bungalow, you can hear next door fart.
As for flats, I'm sure you can get some lovely flats, but I don't like them. My bf lives in a flat. It's noisy. Like living in student accomodation all over again. My best friends mum lives in a flat, the person in the flat below her must be deaf - I was there once and you could hear Coronation Street coming from the flat below as clear as day.
I like my stone built pre-1900's house with a nice garden and walls over a foot thick. Sure you have to cut the grass and can't put a picture up or half the lime plaster will fall off the wall, but at least it has character and is a lot quieter.