Being a realist, for me, means I really don't think I'm going to live forever, and I'll likely be continuing to face more and more health problems.
I am, in spite of it all, more and more cheerful.
I like to look at it like this: the grave is my ultimate destination and getting there is likely to be uncomfortable to say the least, but I'm not going to compound my problems by being miserable about them.
As for whether my individual perspective is the best or not, I wouldn't know. It is, though, the only one I have.
I could, I suppose, if that's what you getting at, concentrate on global issues, like world poverty, or global warming.
But those, for me, are just hobbies. And distractions from the serious issue of having fun.