Uber and Lyft have taken the world by storm.

Business Insider has spoken with dozens of drivers to learn more about what it's like to work for the ride-hailing apps.

A handful of complaints are nearly universal among drivers.

Millions of drivers shuttle passengers to their destinations around the globe on behalf of Uber and Lyft.

Those drivers meet all sorts of passengers, good and bad. Dozens of drivers have told Business Insider that, on the whole, their experiences have been overwhelmingly positive.

But as with any public-facing job, there will be some bad apples.

We asked drivers to tell us their biggest pet peeves, which riders might improve their rating by avoiding. Here's what they said (last names have been removed to protect privacy):