#1 Probably Doesn't Like: CM Punk
The Undertaker is hailed by the large majority of the pro-wrestling community as a thorough professional and someone who is pretty straight-forward to work with. However, every individual is unique, and interactions between two distinct persons could, at times, result in a clash of personalities...irrespective of how easy-going they may be with most others.
Such was the case with The Undertaker and CM Punk--with their real-life heat being a hot topic of debate in pro-wrestling circles back in 2009, when the Deadman 'squashed' Punk to defeat the latter and win the World Heavyweight Championship. The aforesaid match, or rather should I say one-sided beat-down, took place at the Hell In A Cell PPV in '09.
Charlotte Flair to return and wrestle a CURRENT CHAMPION?
The pro-wrestling world was rife with talk that Punk had allegedly disrespected The Undertaker, by paying absolutely no heed to the latter's advice--what with the Deadman advising Punk to dress like a champion in order to represent the WWE, particularly at the company's social and promotional events. Regardless, Punk accorded little-to-no attention to the veteran's advice, and The Undertaker was subsequently booked to dominate and destroy Punk in their match at Hell In A Cell 2009...