I've dealt with brain cancer on and off for most of my life, and for a while things were looking pretty bad. I'm good now, but I think I came to terms with my own mortality pretty early on (around when I was 16). As someone now rapidly approaching 30, if I were to go tomorrow I feel I'd be OK with that, though I would worry about how my fiancée would take it (or not, I'd be dead so I wouldn't care about much of anything). I'm still looking forward to many more adventures but when my time is up, so be it.