M-32 Scout Droid. I've made a copy of this.
It has instructions.
U-39a Probe Droid. Made from parts from just two sets.
L-58 Artillery Mech.
It has a missile launcher variant.
CT-14 Fire Fighting Droid. This has a real nice use of color to set a mood and some nice sticker use too.
There are a few other pieces that look neat but look like they're too fiddly and fragile to be used as game pieces. He also has a habit of using minifig hands and legs that I personally find kind of annoying.