Even when I re-watched the movie in college, Unicron remained one of the most amazing ideas ever. The movie was fun but noticeably dated. Unicron though remained fresh, terrifying, and purely evil. He was an unstoppable planet consuming robot. He wondered the universe destroying entire civilizations simply because he could. I can't help routing for him, simply because he is so amazing.
Yes, Unicron has forever embedded himself in my mind as the archetype of awesome. To honor the dark god of the Transformer's universe I have create a new user icon of Unicron in planet mode (the far scarier mode). I plan to use it for impending doom.