The mock draft. Over 25 years, I have grown to hate it. But, hey, when in Rome.
The process starts after each draft ends, which is beyond ridiculous. Really, any mock draft conducted before free agency is a waste of time. Needs change dramatically based on players signed and players lost.
I stopped personally compiling the PFT mock draft years ago. I rely on someone who enjoys doing it far more than I do, and who is sufficiently plugged in to develop impressions without specifically fishing for information for piecing together a mock draft.
I used to tinker with it a bit.