every time i think about the thin men, i think about an interstellar lawyer agency, having many branches and agents all around the universe. they go around space with their suitcases and in their suits, looking human, but slightly off (you know, just like real la-BAD KERLC! RESTRAIN YOURSELF!). then they pull out plasma cannons out of those suitcases.
Have you seen the episode of
Adventure Time with The Businessmen? That's how I'm going to imagine them talking.
They're probably the alien design that I like the most so far (out of the four), especially if the animations are all they're cracked up to be. They'll add an element of visual threat that's a bit missing with the Sectoid redesign.
For me at least, part of what made the Sectoids a bit creepy was how child-like they looked, juxtaposed against their violence. Of course, they're only scary for a little while and then you consider them an annoyance... Until the Commanders start showing up, and then their puniness isn't so funny anymore.
Then there's the Mutons. I appreciate the inhuman, gorilla-like design, I'm fine with that. I really love the idea of them moving and acting like a military unit, which is what they were always supposed to be - I'm hoping "tribal" can extend to mean "wolf pack".
There are two problems the Sectoids and Mutons share that I have concerns about. One is the lack of mouths - hearing an alien scream when you kill them was one of the most satisfying parts of X-COM, and I'm hoping that's still there, and it would make a lot more sense if the aliens had mouths to make noise with. The other is the abundance of light-emitting elements, especially when they describe the Sectoid's glowing chest as a feature of its design. I don't know where they're going with that, but it certainly doesn't make them look stealthy, which is exactly what all of the aliens are supposed to be, looming up on you in the dark.
The cyberdisk I have no opinion on, and won't until I see one animated.