I have a few of my own Sims whom I'm so attached to that I had to turn them into vampires because I couldn't bear the thought of them aging and dying but did want some story progression. :sweat_smile:
I also have some premades I'm so incredibly attached to that I'm seriously thinking of immortalizing them. My absolute favorite is Bella Goth, who is currently getting closer and closer to becoming an Elder in my main game... so I am seriously considering letting my child, who will turn into a teen and vamp soon, turn Bella into a vamp. God, that'd be chaos, a Goth turned into a vampire! And not just some Goth...
Another one of my absolute favorites is Max Villareal. He is very involved in two of my Sim's storylines and one of my Sim's childhood best friends and first love (though he rejected her). MCCC married him off three times but I always had to come in and fix it because I didn't think the Sims he was married to were good enough for him. MCCC recently married him off again, this time to Morgan Fyres... which I think I'm OK with. They already have a child together, so I guess I'll just let them be and not intervene there lol.
Also Caleb and Lilith Vatore, who I'm so happy that they're immortal. Still reserving both for one of my future born in-game Sims lol. Had MCCC leave them alone because I only want the best for those two. And Vlad, of course. Gotta love Vlad. I'll always consider him the biggest and baddest vampire around even if my Sims have already surpassed him in powers. Vlad's the ultimate vamp, and he always will be lol.