Bottom line: your information belongs to you. We will always try to give you as much control over it as we possibly can.
How do we actually use your data? We compare it to data from a bunch of other users (using fancy math) to figure out what else you might like.
In the future, we may create stuff that allows you to share your personal data with other sites. This will be completely optional and will require an explicit authorizing action to enable, sort of like when you log in to our site with Steam right now.
All personal information is confidential. We won't sell it (or give it away). All data is kept in a completely anonymous format and your information won't be used in a way that can identify you.
If we add features in the future that display personal data, yours won't be included, unless you explicitly choose to show it.