Which World Champions other than Viswanathan Anand had a jolly personality? First of all, congratulations to Viswanathan Anand for winning the Candidates 2014 tournament and qualifying for a rematch with Magnus Carlsen later this year! 

I saw this interesting gesture made by Anand towards Karjakin after their game in the Candidates 2014 tournament (video here at 5:42:54). Anand just needed a draw to win the tournament and qualify for the World Championship, but Karjakin dragged the game for a whole 90 moves, making Anand patiently work and wait for the result. After Karjakin finally accepted the draw, Anand made a joking gesture as though he was going to attack Karjakin. 



It seems to me that chess players can be often thought of as "too serious", but World Champions like Anand have helped change the outlook on that. 

Which other World Champions in chess history had a jolly personality like Anand? Or is Anand unique in that regard?
Ah. I somehow missed that during live relay. Thanks for sharing.

Mikhail Tal comes to mind based on his Life and Games. He mentioned about 'forgetting' to stop his clock during tournament games for the sake of his time troubled opponents. 

I don't know how many of us mere mortals could consider doing that. He must have been a jolly good fellow.