i play a vampire family legacy style. i use mods to help keep things moving along. my vamps age and die like normal sims, but their lifespans are a bit longer. and i have my mod set for 0 vamp babies if one parent is human, so that gives me a little bit of control over the offspring. when ive chosen my heir, the vampire parent will share their gift with them, and the rest of the children will remain human.
i almost always start a 'vampire food' club. random sims from around the town that i can invite over to snack on. butler, maids, and nannies work well for this too. nannies are usualy extremely delicious and for some reason, dont have a bite cooldown for me. dunno if its a mod thing or a glitch thing, but im not complaining about it lol. as soon as the nanny wakes up from being drained, any other vampire in the house can drink from them again, so thats pretty helpful. just dont use 'drain life spirit' that one is a pain to recover from and erases a sims memory.
vamps are a lot of fun and pose unique challenges to play. if you have teen vamps (they wont really become vamps untill they hit teen) make sure you account for their whereabouts at all times before they have sun protection! i have lost a few kids that way. standing by the street being stupid or trying to hop in the pool.
also if you use a vamp and play in strangerville, there are a few things to take note of. yes, vampires can get infected if they drink from an infected sim! so make extra sure they dont run off in a daze into the sunlight if they are under the mothers influence! its pretty hilarious when they do tho hahaa. vamps are great i love them