Rarely will I go back to a save. A game's winner is more or less decided by the time I hit Industrial/Modern, so continuing a game would just be clicking "next turn" a hundred times until the game finishes just as I expected it to. And I find the game is most fun in that early exploration/city-settling period.
The rare exceptions are games where the tech difference between the top couple Civs is so close that the game is still undecided. However, I've been running into that situation more often since lately I've been purposely ignoring Rationalism.
I feel like the last 3 posts I wanted to quote were all from you, lol!
This is a quote where I totally understand your point, yet I act the opposite way. Like I said earlier in the thread, I'm the opposite: I'd rather click mindlessly for 100 turns just to see the final score rather than have to move around guys for 40 turns for an equally guarenteed win.
A lot of it, again, is what you are saying: if it's decided, why bother? Yet I'll gladly bother with 30 minutes of mindless clicking so I can see the final score and get some closure, while I'd rather not trudge through moving my mammoth army to the ends of the earth taking capitals.
To sum up: I usually will come back to saves if I know I just have to click through turns and take a little while, ~ 30 to 60 minutes. While I do this, I might put on ESPN, watch a movie, listen to music, whatever, just so I can get some closure, especially if it was a tough game starting out. Yet if I have 2 solid hours of actually having to do stuff (moving and producing units, mostly), I won't bother unless there's at least the slightest doubt about victory.