You're Dr. Claw is 96% perfect! For impersonations, that's excellent!!
"Mumm-ra. Where is you're penis?" xD That totally threw me. the wtf face I made was probably priceless.
"All the way until I was seven years old, I thought I had a kidney!" OMG Starscream! And the mettalic smack noise is perfect!!
Which reminds me.... your Megatron sounds like Vegeta stole Darth Vader's helmet. Is Vader aware of this? 0.o