>>96907
>I think it'd be sad to forget the entirety of a past life
I don't think it's about forgetting as much as it is reminiscing, rather than actively living. Like if you died fighting for a general, and it just so happens that centuries down the line that general's undead descendant or ancestor is vying for some kind of position in society, there shouldn't be that sense of loyalty brought over into undeath. At least not when dealing with broader undead society anyway. One could image that an entire castle of people, knights and nobles and commoners that gets some how magically nuked might have a very isolated, traditional, conform of leave type culture. But you could also expect them not to be a part of any larger undead network of communities because that mentality is just fundamentally incompatible.
>I wonder who shapes this undead culture.
I imagine it's pretty top down. The highest circles of undead all seem to be super socially active. I imagine the oldest and most powerful undead are the most novelty driven and the primary engine behind preventing stagnation, likely because they've potentially already seen it before, or they just have the broadest sense of perspective when it comes to these things. Also they're the most powerful and socially entrenched, the system wouldn't work if they were actively resisting changes coming up from below.
I always imagined vampires as being somewhat separate from the broader undead population of ghouls and ghosts and zombies and wights and liches and so forth. I think it makes sense for them to be staunch traditionalists and sticks in the mud in contravention to broader undead society because vampires don't live in undead society, for the most part. Maybe they do once they find a husband and maybe relocate into undead society and learn to relax and lay back a bit.
But for the most part I imagine that asides from owning castles and what not, the majority of vampires have to blend in to human society, even if it is a bit on the nose "I am Countess Eripmav" they still live with humans, and probably have so preserve their sense of selves and their sense of identity amidst changing their identity every human generation and keeping up with the times. So when they're free to be what they are, vampires, they tend to want to fully embrace every corny aspect of that, bats, big capes, cheesy monologues.