We self built, partly as in this area most houses are bungalows and we really wanted a house and also for pretty much the same price as a low quality new build on an estate we could build what we wanted and control the quality.
We were lucky with our builder as he had a team of really good local lads who actually seemed to take pride in their work.
We did have to make a lot of decisions as nowadays as a lot have said the default is to install the absolute cheapest tat you can find, MDF and chipboard and cardboard for everything if you don't spec otherwise!
If we hadn't have self built I'd have bought an older house, not just because of the lack of quality but the massive lack of space. We have 1/2 acre of garden with our new build, you'd never get close to that otherwise.
Edit: But i don't think this is a new problem, the village i grew up in had a couple of estates built in the 60's, 70's and another big one in the 90's and 2000's and they were all known to be of poor quality.