Decepticons that are non-sentient drones. They are controlled by Megatron or their representative leader at the time.
Vehicon is short for Decepticon Tropper.
For some reason I find the need to build an army of these guys. I am far from doing so and have never had the urge to have the same guy in 5 different colors. With the Vehicons they come in different molds most of the time. There is a winged Vehicon, a car Vehicon, and a Vehicon that has no transformation and has a gun as a hand. Hasbro needed a third one and figured "let's just throw a gun on him." As long as they are all different I will keep buying them.
I have yet to find the "Prime" version. Some reason when I go hunting I find EVERYTHING but him. WTF? I mean bumblebee in all versions for dayz!!! It's kind of annoying.
Me? I'm a Transformaniac through and through. I've been collecting for over 20 years and my collection is starting to outgrow "The Vault"! I collect, maintain and refurbish my Transformers and I am always looking for new (and old) ones to add to my 1000+ plus collection. Feel free to check out my collection, as it's ever-growing and I'll be updating my blog with new Transformers as soon as I get them.