I usually get:
1) People that call and say nothing on the other line. Because of that I only say "hello" once, if I get no immediate reply I hang up since I'm not the one calling you, so you should be paying attention.
2) People that call and say something in spanish, so I have no idea what they're talking about. But I'll usually reply with que?... que!?... QUE!?. Had one guy on for almost 5 minutes before he gave up.
The weirdest one I ever got was a call from some Lexus dealership telling me my car was ready.... *hint* I have no Lexus.
"Hello"
"Hello, is this Mr. ____? This is ____ from the Lexus dealership calling to tell you that your car is ready."
"Uhh.. sorry, you have the wrong number."
"Oh, ok.. sorry."
*hangs up*
(5 mins later)
"Hello.."
"Hello, is this Mr. ____? This is ____ from the Lexus dealership calling to tell you that your car is ready."
"You just called here and I told you it was the wrong number!"
"Seriously?... ok thanks..." *hangs up*
(10 mins later I get another call but there's a woman on the line this time)
"Hello..."
"Hi Mr.___, this is Kristen from the Lexus dealership. You can pick up your car when you're ready."
"Oh yeah? I have a bad memory, remind me what I dropped off there again?"
"Uhh.. one sec... black 2003 IS300 right?"
"Uh huh..."
"Excuse me?"
"Listen Kristen, I already spoke to two people about this subject in the last few minutes. you... have.. the.... wrong... number."
"Oh, my mistake... sorry."
*hangs up*
(10 mins later)
"Hello..."
"Good afternoon Mr.___, this is Carl Johnson, manager of Lexus of Rockville..."
"Right..."
"You vehicle is ready so you can pick it up at your convenience.."
"Black 03 IS300 right?"
"That's correct."
"Ok, I'll be there in half an hour."
"That's fine, we'll be waiting"
now at this point he takes the phone away from his head to hang it up, but starts talking before he actually hangs it up.
"See? How fuckin' complicated was tha.." *click*
To this day I wonder if that guy picked up his car. :lol