Got to say, BW/BM Megatron is my favorite voice. Even if you had never seen the character and just heard his voice, you would be able to tell how intelligent, proper, and sinnister he is! Just such a powerful presence with that voice!
Some of my favorite lines:
"Yessssssss"
"What sheer ruthlessness! What disregard for sentient life! I rather like these aliens!"
"Ah yes, mindless destruction! Good for the spark, I always say"
"I am the alpha and the omega, the beginning and the end! I am that which is, which was, and is yet to come! And you will know my name is Megatron when I lay my vengeance upon you!"
"I suppose, given my imminent godhood, these primitives should really be beneath my intention. Ah, still, no score is too small to settle, I always say!"
"Well, come on. Let's have it. The usual 'Destiny and Honor' speech!"
"Say goodbye to the universe, Maximals! The future has changed, yesssss! The Autobots lose, evil triumphs, and you, you no longer exist!"
"Ah, Optimus Primal, right on schedule!"
Love it! LOVE IT!