A more personal question...
I think the most fun question in my mind after watching Tin Man is, "How would I have handled being placed in that situation?"
I mean, living for a very long time sounds like it would be very interesting, provided that there were interesting things to learn and see and do... and interesting people to communicate with.
But it would be chilling to realize that a different identical copy of yourself is living your life instead of you, and that by your very existence, you are a security risk to their safety.
And I think I would have had to thwap Harlan upside the head after a few centuries; our personalities would *not* match well in close quarters. Think about it... he is the last survivor of his civilization not because he was brave enough to go through the gate, or smart enough to design the whole system, but only because he was conservative/afraid/simple enough to be satisfied with his robot existence and to keep things together with the alien equivalent of duct tape, WD-40 and baling wire...
If I was part of the SG-1 robot team, and our Stargate had to be buried, my priorities would be (1) learn more about, repair and then optimize the station's systems so they wouldn't require so much maintenance.
That would eventually free up more time to (2) learn everything possible about the native culture and (3) perfect the power source technology so the planet could be explored for any unused resources.
After that (and I'm betting that that would take enough years that most of the confidential Earth information I knew would be out of date enough not to be a concern any more...), I'd choose between (4) figuring out how to do non-stargate space travel and (5) contacting Earth via probes through the gate to volunteer my services for exploration and research, assuming that the planet hadn't been leveled by hostiles by that point...
Anybody else have other ideas?
-- Adele