Aw, poor Caleb. I always feel sorry for him. He was given a mediocre aspiration and mediocre traits and then confined to living with his sister who feels compelled to hug him every five minutes. When she's not doing that, she's making one drink after the other and then leaving them out to spoil. I usually delete Lilith right away.
When he becomes playable in any of my games I make him work on skills and aspirations - Good Vampire is not one of them. I get him a guitar, a journal and two bottles of medicine because he seems to get sick quite often. Then he gets to work on Vampire Lore to unlock Plasma Packs. I buy him 20 to start. After that, he unlocks the Grilled Cheese aspiration and the Herbalism skill because they also unlock social options. I've found that Sims love to chat about Herbalism and Grilled cheese. Plus he can make insect repellant which he'll need when he eventually vacations in Granite Falls and Salvadorada.
He always has a good sized garden growing because I always have him working on getting the reward trait from the Freelance Botanist aspiration. I can't tell you how many times he's either burned himself or started fires in the kitchen, at the science lab, or while camping.
When Caleb has downtime in the evening he'll watch the cooking channel on TV or play chess. Some nights he'll play guitar or dance to stereo music. He will always create a painting if the easel is clear. He seems to run out of energy at around midnight and then he crashes for the night. If he has kids, then he'll spend quite a bit of time with them. He's a good dad.
His painting style of choice is consistently Abstract with Impressionistic a close second. Have him admire his artwork as a new possession afterward and he's happy for hours.