So what are your favorite fights in DB, Z or GT?

Mine are Goku vs Piccolo Junior, Kid Goku vs King Piccolo (last round), Vegeta vs Android 18 and Piccolo vs Android 17.

I think my favourite fight was always 'Goku vs Frieza'. It was the best fight we had ever gotten in Dragonball Z and definitely sticks in my memory from when I was a child, not to mention the build-up of the legendary Super Saiyan, which (of course) turned out to be Goku... and then Frieza's curve-ball of his 100% form, it was just amazing on so many levels and even lead to us thinking that Goku had died along with Frieza - though both did survive in the end.