I'm in the other school of thought, I shudder at the idea of a life even half as long as a typical fantasy elf's (in D&D, they tend to cap around 700-800, I think? Others have them living well into multiple of thousands of years).
I'm only in my early twenties as is, but I am more or less incapable of remembering things that had happened earlier this week, let alone several months ago, or even years. I fail to remember relationships I have with others after mere weeks of separation, even with family I have lived with since my birth. I utterly fear the idea of growing to old age, becoming even less able to remember such things. I often end up feeling incredibly guilty because of this as well, as this will result in people I no longer remember being hurt or angered due to me considering them a stranger when they still view me as a close friend or even family.
If I lived for thousands of years, or even just a few hundred ...well, I don't know what I would do, honestly. But it's a scary notion to me, for some reason.