I find movement on the whole far more awkward in hex systems. You can't really see at a glance how far you're capable of moving, especially at an amateur level. Nevermind the duck walking which characterises hex systems.
There's a lot of possibility of using chokepoints in Civ IV, too, you just need the right mapgen. The best were often the fantasy map generators that'd do mountains with snakey corridors which you could put a fort down in. Chokepoint control in Civ V is just far more awkward, especially when trying to move your own units past.
Yes, and?
Hex vs Squares.jpg