One thing that many founders worry about but which isn’t usually a warning sign is if a VC has fired CEOs or founders in the past. Do your research—look at their track record. There are some well-known firms who are so focused on the company that they cut off founders’ heads without giving them a second chance, but most VCs are generally hesitant to remove founders. Sometimes too hesitant. And those who do so infrequently will have a very good reason.