buckworks - 4:14 pm on Apr 24, 2007 (gmt 0)

Webwork, don't overthink this. I sense that you're prone to "analysis paralysis".

Another thought comes to mind:

if someone asked you how to identify a good pair of shoes, what would you tell them?

You'd probably mention things like quality workmanship, good materials, attractive design and so on ...

... but an elegant designer shoe that is superior by every measure is not as much use to you as a pair of second-rate el cheapos that FIT.

Affiliate marketing is kind of the same. The FIT (targeting) is what matters most. You try things out and decide, what works for YOU?