Liberation is the only game I ever really played in the Assassin's Creed franchise. Yeah, there was 1 but my computer could only barely run it so I never got far.
As for Liberation, my opinion is meh on it. The run and stab gameplay is pretty good once I got the feel for the counters, but the game suffers from a confusing storyline (too many timeskips) and especially from what I call first-wave syndrome. As a game on a brand-new console, the developers tried to make use of every single feature it has, user-friendliness be damned. The money-making minigame is an unexplained touchscreen mess, the back-camera is defective most of the time and I still don't know what the multiplayer is even supposed to be.
As for what I'm actually playing right now, there is Mass Effect 2. I don't like being forced into a terrorist/humans uber alles/umbrella corporation group who the game insists now are just misunderstood good guys. As for how true that is, their leader sits in a supervillain hideout, fancies an overly pretentious title and has
Saren-eyes. If he doesn't turn out to be evil, I'll buy a hat and eat it.
Other bad things? The controls feel stiffer than in the last game and too much stuff has been crammed into the same button. Use, sprint, crouch, etc. Too much, too much!
Good things? It's prettier and actually runs better than the first game. The homebase is much easier to navigate and feels more full of life than the previous one. Hell, they even have their own Montgomery Scott!
Shepard headbutts a solid ton of armourplated violence. With his bare face. Someone flinched. That someone's name was not Shepard.

Oh, and he's got his private bathroom aboard the homebase/ship! I only found that one out when I was admiring my fany plastic model rack and the wall slid open. Neato!
The really bad thing? I just spent twenty minutes watching targetted advertisements. And I enjoyed it.