I am a strong believer in the simple logo. They are clean, easy to remember, and cost effective for the client. Below is a example of a simple logo that I sold for a lot of $$ to recent client, more than I have ever made off of a tricked out design. As you can see it is clean and very easy for the customer to duplicate. Although there doesn't seem to be a lot to it, the client felt it conveyed his company's message and that it is very easy to recognize. Complex designs can be nice if done correctly, but when in doubt start out with some simple. It might earn you some Green.