May I ask what reasoning/evidence lead you to that conclusion?
Evidence is a wrong question, and reasoning not much better. Unless, of course, you mean "evidence and reasoning about my own arbitrary preferences". In which case my personal testimony is strong evidence and even stronger for me given that I know I am not lying.
I prefer immortality over saving 28 lives immediately. I also like the colour "blue".
What epistemic algorithms would you run to discover more about your arbitrary preferences and to make sure you were interpreting them correctly? (Assuming you don't have access to an FAI.) For example, what kinds of reflection/introspection or empiricism would you do, given your current level of wisdom/intelligence and a lot of time?
From Mike Darwn's Chronopause, an essay titled "Would You Like Another Plate of This?", discussing people's attitudes to life:
Conclusion, graphs, and references in article. As usual, I recommend reading Chronopause.com as Darwin has many good articles; to quickly link a few: