Greedy VCs who will invest only if they can take an outsized piece of your company. Typically a VC needs between 18 and 22 percent to make their model work—step carefully if they begin asking for more. And don’t assume they’re the only game in town—if your gut is telling you to keep looking, then keep looking. Some VCs court very inexperienced startups with the intention of pushing them around and telling them what to do rather than allowing the founder and CEO to run the company. Mentorship and advice is one thing; orders that must be obeyed are another.