David Caruso
Didn't actually know this guy's name until just now when I stumbled across this video, but on every CSI episode I've ever seen (not many, but it's a professional thing) I found his character to be over acted, smug, and generally annoying. Seems I'm not alone.
General one-liner format:
"Something something (lowers head) .... something... (raises head, puts on sunglasses) double entendre / tough guy punch line."*
Also, I hear every time he parks his car this happens.
* number of ...s not constant but seems to be between 2 and one billion.