I want to live forever. I want my body to stay young and my mind to keep learning about the infinite knowledge this world has to offer.
See, the thought of living forever is absolutely horrible. I mean, what do you do once you've done everything? What happens after the Earth eventually disintegrates billions of years from now? You have to watch as literally everyone you ever cared about dies, and as time goes on, sure you might make new friends, but then they all die as well, and you're left alone... forever...
Read "I Have No Mouth, And I Must Scream". You can read it online for free, and it'll take about half an hour, if that.
No?
I imagine most people have accepted reality for what it is, I still enjoy dreaming about the impossible still. I'm not looking forward to the day where my mind will be too beaten down by reality and I no longer dream, I'm on my way there already...
I alternate between having really optimistic hopes for the future, to having literally no hope whatsoever. And the periods of hopelessness are completely random too - about a month and a half ago I had one that totally destroyed my self-confidence before my driving test, and because of that I was even more nervous than normal and failed.
I try to focus on the dreams that I actually have a chance of achieving. For instance, the one I had which was 'get into university' has now been fulfilled, and it's now replaced with 'get a first-class honours at said university'.