Earlier this month, Marcia Yudkin conducted a survey about working with difficult clients and customers. The results -- which are now available -- are interesting.

Here are the top five client challenges:

• Exhausting to deal with: 63%
• Impossible to please: 51%
• Kept trying to get free advice: 46%
• Whiny, complaining, always negative: 41%
• Asked for changes after project supposedly finished: 40%

Even more interesting are the comments, advice, and perspectives of respondents. Lots of food for thought!