Rocky (1976) - 7/10
I saw this for the first time a few days ago.
I thought it was decent, but nothing to get overly excited about. Are any of the other 5 (Rocky 2-5 and Rocky Balboa) worth seeing?
Watch 2 immediately. Then 3. Then 4. Then watch Rocky Balboa. Then be glad you've come this far without somebody taking away your man card.
But seriously, Rocky is a great classic, and they only get better.