Since there has been a taxonomy of CL "ladies" posted, it couldn't hurt to do the same for the "men" of CL.
The Machine - This is the guy who replies to every ad in W4M, Casual Encounters and Missed Connections. Has learned the art of Copy-N-Paste. Has not formulated an original sentence since 1998.
The Romeo - This is the guy who replies to 80% of the ads and includes page after page of Smoove-B-esque prose. Will not send a picture since his camera/scanner/whatever is broken. Talks a good game online but hasn't left the house in the 2 years since he discovered CL.
The Roller Pig - This is the guy who sends his pic and neglects to mention it was taken in 1996 when he was in college. Since then has parked himself in his Herman Miller Aeron and has Domino's on speed dial. His email conversations generally revolve around why it sucks so much that Kozmo is no longer around and now he has to leave the house to get Ben and Jerry's.
The Married or Attached Guy - This guy 'seems' like the perfect one though can only talk during the day and can only see you once in a blue moon and never after 8 pm.
The Switch - This is the guy who responds to ads in every section. Any port in a storm is his raison d'etre and he truly believes Woody Allen was right about being bisexual. He may or may not mention that he's bi until you've done it a few times.
The Psycho - This is the guy who alternates between posting and responding to posts to start fights. He'll find faults with anything just because it's something to do and defines "getting physical" as including bruises and lacerations. He is generally impotent and pissed about it.
The SNAG (Sensitive New Age Guy) - He wonder's why he's always 'just a friend'. Could be classified as an invertebrate. Drinks Chai Tea Lattes. Still walks his ex girlfriend's dog even though she's married with three kids. His hobbies include collecting stick insects and Yanni. Can't understand why all his friends think he's gay.
The Playuh - Has slept with three times as many women as he is years old. Thinks condoms are only for when he goes to massage parlors and is sober enough to remember to put one on. Has never been tested. Drives a tweeked Honda/Acura/Toyota. Says he's down with Dr Dre though lives with his parents in St Francis Wood.
The Catch - Is tall, handsome, educated, financially secure and a home owner. Only likes Asian hootchies.
The Real Thing - Not caught up on how he looks, where he parties, what he does for a a living. Doesn't care who or what she is either. Can hold a conversation about more than cars/tv/ice cream.