I'm not Lori, but here are a few of the things that I have seen in my experiences as an interviewer... There are many others, but these are the first to come to mind. I tried to list them in order from most common to least common, but I've personally experienced all of them.

• Incomplete paperwork/application or missing paperwork
• Gross errors on paperwork/application (mispellings, bad handwriting, etc)
• Failure to provide "respect" to all airline employees you encounter (It's amazing the way some applicants will treat interns or receptionists- remember, it doesn't matter what you do for the "team"- everybody is important and deserves common courtesy/respect)
• Improperly dressed/bad appearance
• Failure to maintain eye contact
• Ignoring a member of the interview panel (typically a female or very young member of the panel)
• Fidgeting/Rocking back in chair (Actually had one guy fall off the chair once)
• Cheating on written test
• Nosepicking/Nailbiting/Gum Chewing
• Failure to be personable to other applicants or employees
• Lack of logbooks/pilot documentation or falsified logs
• Bad mouthing the airline at the interview (These were the exact words: "You can't blame me that I'm late for the interview... it was your crappy flight that was late getting me here!")