The Most Annoying TV Show Character

[Gregoshi]

Wesley Crusher supports the argument that super smart kids and animals only belong in Disney productions.

The only super brained character worse than Wesley was that annoyance on the (thankfully) short lived Battlestar Galactica sequel Galactica '80 (as in 1980). Commander Adama became a bumbling idiot thanks to the presence of brainiac wonderchild - at least Wesley didn't do that to Picard.

[Fragony]

Marcel van Dam. Arrogant and hypocrytical. I want to smack him. Think I will.

[Zatoichi]

It has to be that David Caruso character from CSI:Miami.
Gah! His awful one liners! His awful hair! His awful sunglasses! His awful everything!

'Bla bla bla ... [long pause] ... bla bla! [puts on sunglasses].

Mind you, maybe I just don't like David Caruso full stop - he annoyed me in NYPD Blue as well.