This 120%. Your day-to-day, your mental health, and your research success are largely a function of your lab's culture, and it's the PI who sets that culture. A

This 120%. Your day-to-day, your mental health, and your research success are largely a function of your lab's culture, and it's the PI who sets that culture. And the unfortunate reality is that PIs really don't get any formal training on culture-setting and people management, so there are some really successful folks out there who suck at running their groups. The way you tilt the odds in your favor for getting a good PI-student match is to be embedded in the field. If you're an undergrad, getting involved in research is a great low-risk way to do this. People in research have reputations in their field, and people in the know will direct promising students away from labs with bad cultures.