I love taking data and turning it into intuitive reporting systems. When done correctly, the reports can be near limitless in the way the data can be displayed and tied with other data tables to give intuitive insights and predictions into the future.
One project I loved the outcome of was a Marketing Reporting System I designed from the ground up, linking together customer data, marketing data, sales data, and product data to give an amazing outlook on where customers were converting from and help better allocate marketing budgets for future years to see true ROI (Return on Investment) and CAC (Customer Aquisition Cost) along with CLV (Customer Lifetime Value).
Unfortunately, I can't provide the code behind this project because it is proprietary, but I can provide a screen recording of how the reporting system functions, which you can see below.