Using an old photo
A self-proclaimed 'Fabio' look-a-like used a 15-year old picture of himself to entice women to meet him. I guess he figured once they met the 'older' version of himself they'd be charmed enough to stay. Not!
2. Telling a lie... or two.
These come in at least three categories - age, name, and profession. I'm sure there are more but only three occurred in the 1st episode (that I saw). The musician (from mistake #1) said he was in his 30's but he was actually in his 40's. Can't you just hear the umpire? Steeee-rike 2! Or the classic line from one of the female daters on the show: "My name isn't Jennifer, it's Lisa." Which was followed by her revealing that she was a doctor - just like her now confounded date.
3. Asking yourself the wrong questions.
Cynthia, one of the daters, was a bit down after a string of rather unpleasant dates. She asked herself outloud 'Why am I single?' It had a feeling of 'what's wrong with me?' to it. A better question would have been - "How do I need to be to find the man who fits into my ideal relationship?" Or, 'What's the next best step for me in fi$nding my ideal mate?' Questions that focus on the positive of what you can do or be.
4. Breaking up by email
This is probably more of an etiquette 'violation' than a mistake. Breaking up with a date by email. While the fellow said it was a cop-out, it was still tactless.
