I think there's something inherently interesting in the Monday morning quarterback: the guy who, you know, sits at one end of the briefing room and tells everyone what they should've done and how they've screwed up.
After 'Star Trek,' I was the commander on 'Stargate Atlantis,' the final season, and once my character had become a good commander, I was sorry that the show didn't last beyond that.
Let's face it: Amanda Tapping's shoes are difficult to fill. She's a great actress and a popular character on 'Stargate'; she's just a lovely person.
If you're looking at my other major science fiction roles - the Doctor on 'Star Trek' and certainly Woolsey on 'Stargate' - I often play characters that might be good theorists and good thinkers, but you wouldn't call either of them very macho characters.
'Trek' is probably more cerebral and philosophical. 'Stargate' does seat-of-the-pants adventure and humor better.
I didn't realize it at first, but the Doctor is in the same spirit as those natural 'outsider' characters 'Star Trek' series have, like Spock and Data.