Allow Custom Fields on Sign Up Forms
Sign up forms have very limited ability to apply necessary contact attributes. For example, when someone signs up via a form, I need to apply a badge to them based on the county in which they live. Right now, we have counties as a badge, but no way to apply that badge to a user sign up. They have to be manually updated.
Allowing custom fields as a sign up form question, and having the appropriate badge applied as the contact is created, would alleviate this. It is also very common functionality.