Sometimes I look forward to the prospect that I can be a capricious, grumpy old bastard and get away with it. Me and a friend at school used to ponder various theatrical musings a comical couple of geriatrics could get up to, and had quite a bit of fun doing so.
Other times, the thought of aging having not achieved certain things and the knowledge that 'in five years I might not be here' positively terrify and distrub me to the point that I must push it out of my mind. Though I used to experence that more when I was young, the fear of death. Until I fully overcome that, it is the only manner in which I envy those who believe in god.