It may be nostalgic, but my time remembering Cardiff at its best was before devolution at least, and it is the same kind of size as Coventry. It used to have the Astoria etc on the main shopping street, so would be like having a major club where Debenhams lived or somewhere, meant the life was there all the time.
I blame Otis for Far Gosford Street. I've ventured into FarGo a few times after he recommended it when it opened - always been deserted. In daytime, the shops were closed and seemingly opened at random - at night, it was indeed threatening as hell! I just don't rate the brewery there either, although others seem to.
Before it got 'gentrified' I remember going into a pub along there, and the barman sodded off and left us to it(!)