People give DBZ a lot of crap for characters that "grunt, moan, and spend half of the time talking at each other in the middle of a fight." While those points are certainly true to some extent, I think the public as a whole largely ignores the fact that many of these "long speeches" are actually pretty darn heartfelt and have an impact on storylines.
So, I was trying to think of which ones are particulary meaningful or moving. At the moment, I could only really think of two.
Bardock to Freeza at the end of the Bardock TV special. Man, ya gotta feel that one. The man knows he's pretty much boned, but to say what he said to Freeza... oh yeah, that pretty sold me on that character. The fact that the line DOES come true via Goku's actions against Freeza makes it even more delicious. I wouldn't say I feel *bad* for Freeza, but more like "haha, you're screwed, Bardock was right!"
Next up, I'd have to say Vegeta's speech/monologue during the Buu arc when he admits Goku is Number 1. Kinda feel sorry for the sap.

Any thoughts?