Second from the top and second from the left. It strikes me as having an odd personality, or maybe it's just the rake-like fingers.

The 5th one on the third row ^^

Well fifth from the left ^^

second row, second to last

any of the ones on the second half, with the spikes sticking out, don't matter which one,
amazing the detail one can achieve with only one hue

thats digital doodlin for you

Third row from the top, far right.

i like the 3rd one on the 3rd row

i love them all =3

The very first one looks like the Special Defense Fortress (SDF-1) Macross, so that should be easy. However, if it's supposed to be in accordance to the title, I recommend the 5th in the 3rd row and the 3rd on the 4th row. The first one is because the spikes could be used as a representation of ventilation systems used to exert steam as a cover, and the second choice is the design looks as if steam is exerting from the robot and into the fixtures on it's back through those tubular structures, which could probably be condensed down into a compressed air used for firing the weapons projectiles.

yea, great imagination for the uses of te things in the sillouttes, the process i used to make these things are all purely accidental and that which gets my creative mind flowing. But its a little too late now, when i posted this was two days before it was due, giving that day between for people to make their decisions and i already made it, once this week is over, im gonna post what i finsihed this quarter