X-Com and anything except Assassin's Creed. Srsly. Don't play that.
Why? More importantly, why did you listen to him when he provided nothing to say why you shouldn't buy it? If you listed it to begin with, it must be something you were interested in.
I've completed all of them with 100% synchronisation and had a lot of fun playing the multiplayer (I love Ubisoft's multiplayer <3), so I'm rather bored of the franchise at this point, which is really bad timing since they finally pushed through the last spin-off and got to the sequel. Right now I just want something fresh with a lot of content. I know what I'm interested in, and I was tentative to put it on the list in the first place. I'll get it once the price drops.
Assassin's Creed 3 and X-Com.
Don't listen to this bullshit about AC, it is easily the most enjoyable series on your list, but the PC Gaming Master Race won't stop being butthurt about Ubisoft's DRM that they aren't even using anymore.
I'll go through this one in reverse, just for the sake of it.
1. I'm not getting it for PC, so there goes half of your sentence, out the window.
2. "The most enjoyable on your list." I don't even want to go into how little effort was put into that. No details, no argument, no effort=no consideration.
3. All thats left is "Don't listen to this bullshit about AC". Trust me, I won't.