Some people spend most of their time contemplating past pleasures, past loves, past accomplishments. Some people take no gratification in the present because they are working towards some future goal. Some people have no nostalgia and no planning and only consider the moment. Do you live more in past, present, or future? What prioritization of past, present, and future do you think is ideal?
There's a Monster Magnet song with a line like "Don't worry about the future, forget about the past". I hold that true for the most part. The majority of the time I worry about the now, but with that I still plan for my future here and there and have those memories that keep me from doing a lot of the stupid shit I use to do.
I think this whole question is REALLY based upon your age. When I was 25, I thought about the past, lived in the present, could give a shit about the future. The older you get, the more the future becomes relative....And truthfully, that's how it should be. To think that some other 25 year old is soooooo worried about the future saddens me, actually. The future will come...It's a definite...But for now...Live life!
We all live in our past because our actions in the past is what got us exactly where we are now. But still we can plan our future with various goals and live for them. That way we'll be one step ahead of us, read "living in the future".