The "down and dirty" or "nitty-gritty" part is why I could never really get into BSG. I also think it is why the latter ST series didn't work very well. They strayed away from Gene Roddenberry's original vision of a more positive future. GR's universe was full of optimism that no matter what happens we will rise to the occasion and triumph.
The latter series showed too much reality and too many of our flaws... the "glass became half-empty" instead of "half-full".
What do you think?
Frankly, I never saw TOS as 'full of optimism'. I think TNG was happy-shiny like you describe, but I never saw TOS that way. The TOS crew battled plenty of enemies who threatened from all sides...and the characters in TOS were not perfect - they all had flaws - right up to and including Kirk, who was perhaps the biggest womanizer in all of Trek. But these flaws, by the way, are what made the characters interesting and 'real'.
IMO, TOS and TNG are very different shows. The TNG characters talked constantly about how far they'd 'evolved'....but I don't recall nearly as much talk of 'evolution' in TOS. Sure, they were the good guys...just like our heroes in DS9, VOY and ENT were the good guys. But they were flawed heroes. In fact, the ONLY crew that was portrayed as near perfect human beings were the TNG crew - who I thought was by far the most plastic crew of the bunch. Seven years of that show, and I can't say I really KNOW a single one of those characters. This was not the case with any of the other shows.
And because of that, IMO, it is TNG that strayed the most from TOS.
And no...I don't give a hoot that Roddenberry was involved in TNG. I don't see it as anywhere near his original 'vision' (as everyone likes to refer to it - as if the man was some sort of prophet or something) - at least not the 'vision' I saw in TOS. TNG is chock full of 80's PC mentality that is not present in TOS, DS9 or ENT. I think a little of it leaked into VOY...but not nearly to the extent it was present on TNG. So as far as Roddenberry's 'vision' goes? - I think he betrayed his OWN vision with TNG.
Me? I LIKE my heroes to be flawed. Because to me, that is a real reason for optimism: that even flawed individuals like you and I can do great things...and rise to the occasion, despite our flaws and mistakes...despite our humanity. That, to me, is the definition of a true hero.
It's easy to be a saint in heaven, after all.