Glad to see I'm not the only one here who liked Duke Nukem Forever. I myself didn't expect it to be a be-all, end-all great game. But my expectations for it weren't exactly sky-high either. You want some perspective? I'll give you some perspective:
Not to pull age on you, Bob, but I've got at least a good 10-year lead on you lifewise, so I think that allows for a little more life experience. Anyway, when Duke Nukem 3D came out, I was 25; old enough to know better, but still immature enough where that game's crude sense of humor still appealed to me. It was also around that time in the 90's that was really the golden age of FPS games (the 90's didn't totally suck). Wolfenstein 3D, Doom, Heretic, Hexen, Dark Forces, Rise of the Triad, all of them came out at this time. All of them were fun and none of them were hampered by realism or the dark and gritty attitude that the genre has become since. And DN3D was the perfect example of that. Is it a relic? Yes. But I wouldn't have it any other way.
Considering how you ripped on modern FPS games on your "Worst Person" GameOverthinker segment, I would have expected you to have been a little more kinder to DNF. In my opinion, both DNF and Bulletstorm have been like breaths of fresh air. I tend to regard DNF the same way that a zoologist would marvel at the sight of a living Dodo bird or American Passenger Pigeon in this modern age: something long thought extinct that you would never have thought you'd ever see again. I had a feeling that when it finally came out, that the younger whippersnappers who've been raised on Halo and Call of Duty and Medal of Honor would probably shrug their shoulders and wonder what all the fuss was about. And as it turned out, I was right. But for me and others in my age bracket, this was pretty much the game we had been expecting since 1997. And I don't consider that to be a bad thing. The game is what 3D Realms promised us initially 14 years ago before they fell into the trap of one-upping themselves with the latest graphics engine. If today's gamers find fault with its now-antiquated game design, that's their problem, not the game's.
As for its humor? Well, I found myself laughing out loud at points in the game. While I'm very educated and well-spoken, I'm not so self-righteous as to think I'm above adolescent humor. There's still a part of me that's very much a quintessential guy: I like going to strip clubs and listening to Howard Stern every now and then, and it's that part that DNF appealed to.
As for Nathan Fillion, I wholeheartedly agree with you. The guy's a good actor, but just because he starred in what turned out to be the original Star Trek of the 00's (a genre series that struggled in the ratings, was unfairly cancelled and achieved cult status because of it) doesn't mean he has to be in EVERYTHING. He's doing fine like you said. And if he does get a role in anything else, more than likely it'll be for the exact reasons you gave.
As for Green Lantern, haven't seen it yet. I've talked to a few people I know though who said they really liked it and who are at least familiar with the mythos. So I can't believe that it's totally wretched. Still, I think you're right that it probably won't get a sequel, and you're spot-on with how these things tend to go (although I hope that won't be the case for any sequels for TRON: Legacy).