#1 Face fans refused to cheer: John Cena (2005-2014)
John Cena is a Superstar unlike any other.
Debuting in 2002, Cena would ironically become a beloved heel on SmackDown, thanks to his rapper gimmick, which eventually turned into a face turn for the Doctor of Thuganomics.
Capturing the first of his 16 World Championships at WrestleMania 21 in 2005, Cena would become the face of a new era of WWE, though it wasn't long before fans turned on him. At it's worst, Cena would get booed out of the building at many events, though never turned heel during this time.
Many reasons are often cited for this reaction. Chief among these is Cena’s limited moveset, his clean-cut hero demeanor, and his penchant for getting beat down in matches just to overcome the odds. Despite crowd reactions, Cena has only briefly shown shades of his original “Dr. of Thuganomics” persona (such as his performance at WrestleMania 35 earlier this year), avoiding a heel run altogether.
The crowd has slightly warmed up to him lately since his absence from television and leaving the World title picture, as well as his 2015 US Open Challenge, that gave the 16-time World Champion a chance to showcase his skills and win over many of his critics.