ArmA 2 was supposed to be the last game I bought in a while ... but I cracked and got Dawn of War 2: Chaos Rising, as I heard the campaign was excellent.
Now, I'm a Warhammer player, but I don't collect Space Marines. Every time I play this game, though, I get the urge to. Dammit!
Edit: Well, I've been playing for a little while now, and ... well, it has all the things I usually dislike about expansion: "here you go, take all these new skills, items and characters, so you can spend hours just staring at the screen trying to figure out what it all does, instead of gradually introducing new things!"
But I'm used to that, and I guess it's to be expected.
What puzzles me is the corruption mechanic introduced in the game. You can equip incredibly powerful items, making yourself a walking whirlwind of destruction, but damning yourself in the process ... or you can resist the temptation and ... get absolutely nothing in return. What gives? It's like if you made a Star Wars game where you could turn to the dark side and become a walking god, or remain on the light side and get fucked over in the process. From a lore point of view, it makes sense, but this is a game, dammit. I want to be rewarded with powerful shit for resisting Chaos!