This isn't necessarily mine in creation, but mine in possession only. I was just walking through my local flea market and found this cool guy in a box of other bionicles.
The original owner took a sharpie and added his/her own touches on the certain parts and especially the mask, giving it some kind of scarred General Grievous thing going on. The coolest part is that it also came with a grey cloth cape with holes and tatters cut into it for that...tattered look. I asked the lady how much and I gave her $3 for it. I'm not sure what exactly the original owner's ideas were, but he/she was a total genius. If I could only tell him/her that this guy is now in good hands, I would.
The only things I added were those horn pincers from the flea market box, a Meteor Blaster and replaced his cloth cape with Construct-A-Zurg's cape who is now disassembled. The grey cloth was given to another toy, because it was just the thing I was looking for. Megatron now wears it proud.
Anyway, giving credit where it's due, to the genius who made it first.