I think it's the presumptuous nature of stating one is an 'idea guy' and all the connotations that sort of naturally follow from there... aka, we poor developers lack some special creativity gene or something. Not a good way to start a business relationship.
Case in point - my business partners needed a developer and when I met them for the first time they presented themselves as experienced business men in their niche - sort of 'vertical market experts' as another poster termed it. At no point did either claim they were 'idea guys' - instead taking a more humble approach that they had this idea they wanted to build and would like to hear my thoughts on it. I knew I could work with them because they weren't making such grandiose, ego filled statements from the get go.
Case in point - my business partners needed a developer and when I met them for the first time they presented themselves as experienced business men in their niche - sort of 'vertical market experts' as another poster termed it. At no point did either claim they were 'idea guys' - instead taking a more humble approach that they had this idea they wanted to build and would like to hear my thoughts on it. I knew I could work with them because they weren't making such grandiose, ego filled statements from the get go.