Before I go on, I must note: I have been a big, at times despairing, critic of Civ V, but the patch has helped considerably. Tweaked properly, this game has real potential.
Also, I have been a big fan of both Civ II and Civ IV.
Further, I do not seek to generalize, but I do see some trends that appear.
Which brings me to my point: what bothers me is this Civ IV ideation. Nobody seems to remember:
"I hate espionage. All Sitting Bull does is poison my water."
"I hate religion. It is just an exploit to make Izzy love you."
"I hate tech trading. Mansa Musa is a tech whore."
"The AI is stupid. They just get bonuses on harder levels."
"I hate SoDs..." well, you get the point.
And for anybody complaining, "You can just buy everything:" IIRC, you could buy everything on Civ II, also. On Civ IV, you could whip everything the first half of the game, and buy everything the second half of the game.
Civ V has serious flaws worthy of criticism, but some of the posts are over the top.
I voted +2, despite my fondness for Civ IV. Some call it boring and unengaging. I feel far more engaged in some ways to Civ V than IV now that (after the patch) my intelligence doesn't feel insulted.