As to the OP:

:| Nostalgia isnt a comfy subject for me right now, but at any rate, I do want to say that there's a big fat giant goose egg in the column on the chart of problems when it comes to fondly remembering the past. ruminating over past hurt, longing for past glory, sure, those things can be destructive. Longing for things you can't have back is the worst...

But all in all, there certainly isnt anything the matter with strolling down memory lane a time or two in your chosen life. Its always there, as beautiful as you can remember it. But the future...

Well, like all finite beings, the future takes up the lion's share of the thinking, I'd wager.