You can redirect after logging in and use a custom URL based on the user role, like the Dashboard for admins and My Account page for customers.
What is that one screen you see regularly on WordPress, but might not have customized so far? Yes, the dashboard. I have been using WordPress since long now myself, and very rarely have I seen someone spending time changing things on the dashboard. I think that is because people care more about what readers see, rather than what they see on the dashboard.
However, the dashboard, in generally should be one of the most productive and useful screen on your site.