most annoying sitcom characters

Michelle - Full House
Urkel - Family Matters
The entire cast of How I Met Your Mother

I know it's a very unpopular opinion but I absolutely hated Sheldon in Big Bang Theory. The character is very smart and I'm sure its a pretty tough role to play but he just carries way too many traits that I can't stand.

Also Walden from the last few seasons of Two and a Half Men.

George- Seinfeld, Klinger-Mash

'Kramer' from Seinfeld.

I hate the way he always justs bursts in to Jerry's place unannounced.

The entire cast of Three's Company.

Benson in Benson, etc. - what a know-it-all
everyone on Roseanne
sam waterston on law & order
Vincent D'Onofrio - Law & order

That "Janice" bitch from "Friends".

The entire cast of Friends and The Big Bang Theory.