Arbitrary hatred, based on looks, style of dress, character they play/music they make:

Jennie Garth
Christina Aguilera
Liv Tyler
Richard Gere
Kate Hudson
Sarah Jessica Parker

Have said or done something that pissed me off, possibly in addition to above qualities:

Tom Cruise
Phish
Laura Prepon
Beekie
Lara Flynn Boyle
Michael Ian Black

I find them completely repugnant for a host of reasons and object to their very existence on this planet:

J-Lo
Charles Barkley
David E. Kelley
Meredith Viera