How many _____ does it take to change a lightbulb? 
Klingons: "Klingons do NOT change lightbulbs!" 
Vulcans: Exactly 1.00000000 
Ensigns: They can't, they get electrocuted everytime they go near one. 
Androids: "Lightbulb: a device for giving out light. An object emitting photons on command. Invented by Thomas Alva Edison in... Yes, sir!" 
Borg: "Changing the bulb is irrelevant. It will be assimilated." 
Q: "Changing lightbulbs is boring, I'll set it as a test for Jean-Luc!" 
Troi: "I sense a lot of bad humor here" 
Riker: "What the hell?" 
Picard: (insert a long pro-lightbulb speech here, involving rights to be changed, etc) 
Geordi: "The illumination device requires high frequency replacement but by replacing it with an isolinear multidimensional matrix chip, we can increase the power output by 42%." 
Wesley: "I can do that!" 
Kirk: "Spock... isthere... any... way... we... can..." 
Spock: "Captain, sensor's show that this lightbulb is not operational" 
McCoy: "It's dead, Jim" or "Dammit, Jim, I'm a doctor, not an electrician!" 
Scotty: "We're running low on dilithium, Captain. I dunno how many more bulbs we can replace" 
Chekov: "Light bulbs were inwented in Russia" (apologies to Russians) 
Sulu: "Setting course for nearest electrical shop, Captain" 
Uhura: "Should I hail Radio Shack, Captain?" 
Ferengi: He'll sell you a new one... double price (and you'll think it's a bargain!)