Replying from a UK perspective, in the late 70's/early 80's my local station 'Radio Hallam' (Sheffield), launched in 1974, always seemed a bit parochial to me with its primarily soft/album rock playlist and rather flat programming style. The infamous 'Radio Luxembourg' (the Great 208) was the go-to station at night, though the selective fading did make listening very annoying at times.
BBC Radio 1 was really the only station to listen to though its AM-only signal on a dodgy frequency meant that coverage and signal quality were poor. It used to have roadshows in the summer which I used to love listening to, hearing them broadcast live from towns and cities around the UK (mostly on the coast where people flocked in the summer) was a highlight of my summer school holidays.
'Radio Trent' from Nottingham came along in 1975 and its AM signal covered my home city well. It was more upbeat than Hallam and included many of the former Radio Luxembourg DJs, but still suffered from the constraints which stations believed they had to follow in order to stay within the Independent Broadcasting Authority (IBA)'s rules. The rules for commercial stations were relatively strict and required a 'balanced output' which stations interpreted in ways such as including a certain number of hours of, for example, classical music programming.
When 'Viking Radio' (Hull) started up in 1984, it was a refreshing change with more upbeat presenters and a more up-to-date playlist. It's FM signal also covered the area I lived very well. A particular highlight was Eric The Viking, a construct of DJ Steve King who appeared on his weekend show and was just a sped-up version of Steve's voice. Hearing Eric sing along, out of tune, with Prince's 'Raspberry Beret' will always remain with me.
Offshore pirate Laser 558 came along also in 1984 and with its US DJ's and 'never more than 60 seconds away from the next minute' music scheduling, it ushered in a new era of more modern radio programming. The local UK stations did morph a little at that time to try and compete but never really got to grips with the US-style of presentation.
Not long after that I left to study at university which opened me up to the London radio stations, as well as the dozens of FM pirates that broadcast in the area at the time, but that's a story for another day.