Hehe, sorry, but from my experience, corporate design lives by how much money was pumped into marketing and branding. And I have serious doubts about any design being able to pull a shrewd businessman into a business connection on its own merit. Of course you can always find a sucker who would be impressed with a letterhead, but that doesn’t sound like the audience you are going for.
Don’t let marketing people tell you they failed because the logo you designed wasn’t “emotional” enough. Kick them in the balls for me if they do and tell them to work harder next time 
Just pay attention to basic color theory, proportions, and common sense marketing principles and your designs will turn out just fine.
As a very simple experiment, try this: pick up any corporate design (brochure, letterhead, etc) from a company you don’t know and never heard of before and see if you get a strange emotional “pull” to give them your money and do business with them. 
I rest my case.
- Shadowrover