Because why not?
It can be on the diversity of the skill, the way you use them, or just the animation.

Mine is the bomber, just because it can be used in so many different ways, and I've found some creative ways to use them which I might make some levels themed around.
This one's difficult...I like most of them. Though in the end, my vote went to miner. This one is the most versatile of the destructive skills and uses a lot of tricks. There's a lot of creative uses for the miner which I've noticed in some levels of Revenge of the Lemmings. Pieuw also has a whole rank dedicated to miners in PimoLems, although I haven't played that rank yet.
Also, what did you put the walker in there for?
Fling-exploder
Miners! Creativity catalysts since time immemorial
My vote goes to Builders, as it's a skill that I find iconic of the series.
This one's difficult...I like most of them. Though in the end, my vote went to miner. This one is the most versatile of the destructive skills and uses a lot of tricks. There's a lot of creative uses for the miner which I've noticed in some levels of Revenge of the Lemmings. Pieuw also has a whole rank dedicated to miners in PimoLems, although I haven't played that rank yet.
Also, what did you put the walker in there for?
Why would I not put the walker in there?
Why would I not put the walker in there?

I suppose if you put the walker in, you could also fit the Faller, Splatter, OhNoer etc. on this poll. jk
Anyway, my passion is building stuff, not breaking stuff. That's why I voted for the builder.