I'd like to propose shortening the vertical height of the member profile page with the following modifications to reduce the amount of scrolling required.
1. The Email Delivery box would be a normally rolled up display, like the Advanced Preferences. The title bar would show the current setting, as in "Email Delivery - Individual Messages". It would only need to be opened to make changes.
2. The Signature box would likewise be normally closed, and its title would be either "Signature - Blank" or "Signature - Custom", depending on whether anything was entered. It would also only need to be opened to see or set the Signature settings.
3. The Posting Privileges box, on the other hand, should probably be left as-is. The choices are much more complex than for say Email Delivery.