Pros
Riot truly cares about the player experience; it's their #1 focus, and it's clear in everything they do. I love the open feedback culture and work autonomy; it's a great environment for those who are passionate about what they do. One thing that drew me to Riot was the enthusiasm Rioters have for their work; it's amazing to work with such dedicated, passionate people. Riot has great amenities for Rioters, too: phenomenal food, spotless bathrooms, convertible standing desks, creative conference rooms, expansive courtyard, and awesome events - more than I'd ever dreamed of asking from a company!
Cons
There's a lot of "tribal knowledge" (without thorough or consistent documentation) in the data systems that make it hard for new people to dive in and utilize data effectively.