Titan FX.05. The start of this interesting series of builds. What catches my eye is the inverted samurai helmet at the front of the torso.
Titan FX.04. A variant on the all popular Tachikoma design.
Titan FX.02. The asymmetrical nature of the body makes this one a little more interesting than the others to me.
Titan FX.03. I know that is a collection of guns on the back but, this one looks like a repair bot to me.
Titan FX.06. The sphere in the middle of the torso makes this one look like a spy bot.
Titan FX.01. This one's a slight bit different from the rest, using 3rd party parts and off color parts. And maybe a bit more threatening.
All in all a very interesting set of builds.