You must admit, the climactic lightsaber duel was pretty cool. Even if it was a spoof of those that came before.
You do NOT want to shoot at Vespa's hair, you just don't!
I liked how Barf was able to turn the tide of battle against the mooks who had the gang backed into a corner during the escape from planet Spaceball.
Lone Starr using the schwartz to reverse the vacuum of Mega Maid. Mind you, this is one man using his power against a massive ship.
Lone Starr is an idiot, but he managed to sneak into the self destruct room, whilst taking out two guards and even knowing how to use the code machines.
For all the jokes, Spaceball-1's transformation actually looked pretty impressive.
For that matter in general the movie had really solid special effects, sets, and makeup/costume work for a comedy/spoof. On the DVD documentary, they explained how they wanted the movie to look as good as the movies they're spoofing.