Question for fans who write about how good of a blocker a WR, TE, or OL is

max said
How are you developing your opinion on how good of a blocker a WR, TE, or OL is?

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I am asking because I frequently read how valuable Tre’Quan Smith is as a blocker or how Juwan Johnson or Cesar Ruiz have improved significantly as a blocker. I always have to take your word for it, because I don’t know how I would verify this for myself.

I think a good starting point is to watch the successful plays and find who contributed in the blocking both at the line and downfield.

(Obviously, it's easier to record and re-watch, pause, rewind etc to be able to do this.)