I always enjoy my modded Skyrim playthroughs as a vampire.

There are tons of vampire related mods.

I use the Better Vampires mod as my main, to really tweak how the vampire experience will play.

I have also been using the Vampire Lords Can Fly mod in my last few playthroughs and it’s a lot of fun.

The Dawnguard DLC has a whole Vampire related quest line and there are mods to get even more vampire specific content.

Lua

Combined Solution

Changelings (d&d style), Doppelgangers, Werewolves, really any kind of shapeshifter, the more shapes/types they can take on the better.