I honestly don't understand how Civ V makes people lists of best games of . It was such a disappointment.
Yes, I've played through to the finish multiple times. Yes, there are a number of neat features in the game. But for me it is so badly flawed I've gone back to playing civ 4 instead.
Lets look at the good:
The city states in particular are a fun and exciting new mechanic. The combat is improved - although I disagree with all the people excitedly spraying their praises of it. It's better, but not *that much* better. I suspect part of the reason people feel like the new combat system adds so much is because turns in which you are not at war are *so dull*. The new and improved culture is also fun, although it doesn't feel particularly well balanced.
But so many aspects of the game are worse. Buildings all feel incredibly generic. City build trees are so mechanical it hurts. The tech tree has been pruned into what I am sure they intended as a beatifully crafted bonzai but appears to me as a fire-ravaged shrub. And - by design - having an actual, you know, empire is strongly discouraged.
And the game is an outrageously buggy beta version of itself. It crashes frequently. There are constant graphical glitches - both of the 'can't draw the terrain fast enough' kind and the 'oh look, the pyramids are under fucking water' kind.
And for all the talk of 'the combat is better' there is another major counterpoint: The AI is functionally retarded. It's incapable of making use of a navy. It can barely make use of the ranged units. It doesn't seem very good at upgrading its units. It makes combat decisions like it is drunk and can't take a city to save its fucking life. It surrenders at the slightest sign of danger (although that one may have been fixed in a patch).
And if you're making a game where one of the major improvements to a franchise is 'combat is more interesting'...and you can't do an AI that can even remotely deal with the combat, what is the fracking point??
In (not very) short: This is not the best game this year. It's probably not even the best strategy game.
edit: On the other hand, ME2 would get my nod. Fun gameplay (although not flawless), pretty worlds compared to the firsts grey mud and 3 buildings, amazing characters, excellent voice acting, great plot. But I'd give it the nod because the developers spent an outrageous amount of effort *finding out what was wrong with the first game* and trying to fix it. I didn't like 100% of the changes, but enough; they fixed most of the flaws very well and the ones they introduced were minor. A++.