If the means were available where you could feasibly have a lifespan of a few centuries, why wouldn't you take it? You'd get to see spaceships and all that Golden Age sci-fi **** and get an opportunity to explore the universe.
I only bring this up because within the next ten years you are going to see procedures and products on the market that have some kind of legitimate effect on lifespan. Especially in regards to some the advances being made with CRISPR and over the counter stuff that will eradicate your 'senescent' (AKA zombie) cells, among other things.
CBC.ca - October 31st, 2017 - Your "zombie cells" are aging you from within