What would you consider most about joining a startup?

I recently interviewed for a startup and decided to pass. They had a cool project and what seemed like cool people but their business model was prone to lawsuits and were still not generating money. I don't want to work for a company that relies only on VC funding.

So this startup is mostly dominated by "guys". 4 girls out of a ~100. that's a red flag of diversity if I ever saw one. right? I'm not sure they aren't just hiring their friends etc.

The probability of success.

A completely correct, but completely useless answer.