Cofounder relationships are among the most important in the entire company.
Companies that I've been very involved with, that have had a very bad first hire in the first 3 or so employees never recover from it.
You want to think about what is the path for my first 10 or 15 employees going to be as the company grows.
Ideas by themselves are not worth anything, only executing well is what creates value.
The way to have a company that executes well is you have to execute well yourself.
Founders need to figure out what the message of the company is going to be.