The Office - hands down, the greatest comedy series ever. So many great memories.
Red Dwarf, a close second. The earlier seasons were by far funnier than the later ones. But there again, it's run for over 50 episodes, whereas The Office got out after 12 episodes and a 2-part Christmas finale.
Fawlty Towers, third place. Once again, only 12 episodes. The brits have the right idea - get out while the show's still fresh, always leave them wanting more.
The Young Ones are not far behind, likewise Blackadder and Bottom.