That's a tough one. There isn't a single episode of this show I don't love (I'm one of those crazy people who even likes Hamlet). My favorites change constantly, but here's a list, just pulling them off the top of my head. The Mike and Joel lists would probably be different every time, but the shorts list is probably more consistent. Here we go:
Mike:
Zombie Nightmare
San Francisco International
Riding With Death
Werewolf
Final Sacrifice
Joel:
Star Force: Fugitive Alien II
Master Ninja
Attack Of The Eye Creatures
The Day The Earth Froze
Operation Double 007
Shorts:
Home Economics Story
Hired! part 2
Is This Love?
Last Clear Chance
Once Upon A Honeymoon