Web 2.0 Angel Investor Jens Kunath just answered my question about preferred character types of founders when choosing a start up for an investment.
As a basic result he mentions on his blog, that within the initial founding state enthusiasm and rock solid knowledge about what is going on on the web are way more important to him than detailed knowledge of controlling or marketing.
Though he also mentions, that this becomes more important the further the company grows.
Thanks for the comment, Jens.
The pictures are online now.