With all the real responses to anything in the game consisting of (1)"Okay, I'll do it, tell me more", (2)"Some other time", and in other situations, (1)"I'm good", (2)"I'm neutral", (3)"I'm pretty evil", you can't really expect people to take the game seriously.
Okay. I do have to point out that the most beloved games around here (barring MotB, maybe, and I do think you're exaggerating the variety of consequential responses a bit) all basically worked along the same lines. I didn't notice Arcanum having a significantly different dialogue system than you just described, or even PS:T for that matter.
And actually, I recall quite a few consequential choices to be made in BG2. Do you side with the Shadow Thieves or Bodhi? Do you side with the Sahuagin King or the Rebel Prince? There were several ways to get through the Underdark, and your dialogue options (say, with the silver dragon) -did- matter if I recall correctly. Come to think of it... did you tell that rogue ship captain guy (Saevor Haveran? Something like that) to piss off? If so, you actually skipped the entire Sahuagin section. The responses you picked during the fighter, mage and bard stronghold quests made a very real difference in how things turned out. And if you care about the romances, saying the wrong thing would definitely have an impact on those.
That's a lot more c&c than I can think of in any other game that is beloved around here.
Yes, of course, in the end, you always wind up in hell challenging Irenicus. Guess what? Pretty much EVERY game, even the most beloved games evar around here, do wind up ending up at the same place in the end.
Including MotB, where no matter -what- you do, you still can't really challenge Kelemvor or really attempt to bring down the wall. For the record. (Even if he would've snuffed you out instantly if you tried, I really think you should've been able to choose that option.)
Qwinn