Thanks. I voted for Bubble and Rock.
I love the Bubble style because of its futuristic look and the traps in there, and I also find the bubble water to be very cool. I don't like that it doesn't have steel, but it doesn't stop me from voting for that style.
At first, I didn't like the Rock style, but I was young back then. Looking at it now, I am starting to appreciate the nature outlook of the style, and it is actually more versatile than you think, with the chameleon trap, the seaweed, and actually making unique designs with the branches (e.g. Friendly 12 in MobiLems, "Tree of Life", and a level by a past user who doesn't come here anymore that had the design of a chameleon using the grass pieces). However, that "OUT" sign on the exit flashes too much and it may cause a headache.