I consider myself a Civilization veteran. I played the very first game on my Amiga 500 back in the days, it was a pain in all sorts of ways and it's evident the game has evolved substantially since then.
I still consider the fourth iteration, together with the expansions, the best but Civilization V isn't far behind. Why? Because of the latest expansion released in July. Brave New World gave the game a meaty middle that I have missed in previous versions. If it wasn't for the first expansion being so-so I'd say this is the best Civilization to date. Hopefully they'll release another expansion in a year's time to finally surpass Civilization IV.
but why can't they just make it a good game in the first place. civ 5 30 euros, gods and kinds, 30 euros, i have to spring 30 euros for brave new world just to make the game fun