This is hard for me, because Piper was an absolute tier-zero legend from the mid '80s up until 1992. Then he completely fell off for me when he returned to the WWF in 1996 to feud with Goldust and stunk up WCW for years with many, many horrible matches and rambling nonsensical promos and then further sullied his career in TNA and various WWE appearances.
Promo work (at his prime): 10
Personality (at his prime): 10
Ring work: 5. Average wrestler who could be carried to a great match with the right opponent. Favorite match is vs. Bret at WM8 for the IC title. One of WM's best matches and one of my favorite matches of all time. Great storyline of old friends getting heated with each other all in the name of competition and championships. Loved the tease in the match of Piper considering heeling it up on Bret as well.
Overall: a 7, because the second half of his career was so godawful, I can't disregard it.