Worf's Propensity For Stating the Obvious

[Mott the barber]

Troi is by far the biggest offender.

 

[I am not Spock]

Worf's one liners are hilarious

'There is a female voice asking if we want ...room service'

'Tell her no'

'NO!' (slams down telephone)

 

[The Old Mixer]

I just got a good laugh watching "Data's Day", when he shows Data champagne glasses at the replicator console and says, "My adoptive parents often give these...things...at family weddings." Great delivery.

 

[I am not Spock]

The most hilarious Worf moment ever (at least on TNG, there are many other great moments on DS9 as well) is in 'The Dauphin' in season 2. Anya orders Pulaski to kill a sick patient. And turns into a huge bug eyed monster which Worf grapples with for a few seconds, until a few non SAG security guards show up and strike dramatic poses. Worf waits til she morphs back into an elderly lady before he decides to try to hit her. It's freaking hilarious!
http://www.youtube.com/watch?v=-0_70d-KVe4

Also, Troi was definitely the master of the 'No shit, Sherlock' moment

 

[The Old Mixer]

^Well geez, if we're talking "The Dauphin", that's got a far more classic Worf moment...his explanation of Klingon mating rituals to Wesley.