Mm. People can go either way. It depends if you decide to keep in touch with those you care for and their descendants. Doing that will make you feel ancient, and you will see ghosts.

[Alucard will leave it up to Jack to decide how literal the ghosts may or may not be. The answer is yes to both interpretations.]

But it keeps you grounded and human, and in my experience, that's where the risk of a long life lies. You can forget what it is to only have one life time, and your ethics, morals, values those can become monstrous and cause real harm.