My favourite, well not favourite, I can't really choose. But the fight that I really enjoyed was Nappa vs. Goku. Mostly because so much suspense was built up before Goku's arrival. When he finally arrived it brought a tear (shut up) to my eye when I was watching it for the first time.
I also liked the Vegeta vs Goku that followed that. That Gallic Gun - Kamehameha struggle is one of my absolute favourites, if not the favourite.
The fights that come after the Saiyan saga are cool and all, and I love them, but something is missing o_o
I watched the original DB and I love those fights even more and watching the fighters train (no not in THAT way). Reason is because it somewhat more easier to think "Hey that COULD be done" or "Hey maybe I COULD do that", which makes it more enjoyable for me
Worst fight... hmmmm...
Well sorry to some of you but I would say the Trunks vs. Frieza and Cold.
And WTH is this lost movie you people are talking about? And this huge guy that beats up everyone, Hatchback? I never heard of this?
At first I thought you were talking about Brolly or maybe that Blue Android(super something). But I don't thin you are. The only other thing I can think of is Bojack.