I think on a macro level, you will have two 'active' factions - you'll have the old guard, and you'll have the iconoclasts. You will have people who want art, but only 'safe' art - the way we get movies greenlit by pitching them as 'It's like Jaws, combined with Mean Girls', the Powers that Be go 'well, both those made money, so it's greenlit'. The opposite end will be your John Waters (a hero of mine) who will push the boundaries and argue that his 'filth' is art.
I think there would also be maybe a cultural 'softness' to a civilization that always has Had, and has not had to chase survival for awhile. You will see people who are for bringing in former enemies or devils into the city, 'in safe numbers', because how better to debate the true nature of existance than with a devil who never ages, and has seen and taken part in the lost great ages.
You may even see serial killers develop, or other kinds of deviance, where, to them, what harm and crimes they do are art. Even if the society is 'good', at some point I think the decadence sets in and the jaded monotony leads to some... extreme things possibly, either in crime or even philosophies - look at our modern world for some 'out-there' ideas that seem to be developing because people have a lot of free time as of late to question things and ask questions and develop cliques. YMMV