The reason that most draft boards and mock drafts don't interest me is because most them look the same. Nearly everyone doing them just goes by the same hottest names, and then may slightly re-shuffle them. There's a reason NFL teams have scouting departments that they spend millions on. This is a job for real pros, and they aren't running around telling everyone how they grade players. And, they don't even bother with guys that don't fit their systems.
Yeah, there's a few good draft guys around like Dead and Alyo that do their homework and have a keen eye for guys most of us won't even find on other draft boards. But, man, PFF is awfully darn good. They actually know what they're looking at and it's anything but a popularity contest. Especially pay attention to how they rank FAs for each position.
