I'm the only hope for an alien race.
I don't like that I may die, of course, if I couldn't tell a thing to my family... But can I at least ask the aliens to tell them where I went to? If I do survive, can I come back to earth and tell people what I did? Does it start an age of intergalactic communications between earth and the saved aliens? Maybe my existance is what keeps this saved dudes from tryng to take over the Earth?
Can I please come back in my own spaceship? I know of a certain girl who'd love it. Love me. Whatever.
I think I would say no, because I don't want to die and have my family and friends have no clue about where I went, but then I'd feel bad for not saving an entire race of sentient beings that needed me.