This is a really tough question. And it all boils down to personal preference.
I really love the idol episodes but if I had to pick a top 10 (in no particular order):
Kim Woo Bin - he really lets his hair down and isn’t afraid to look silly. And, in the beginning, he isn’t all that great at challenges but is still really competitive.
Choi Min Soo - No 3 words strike bigger fear into the hearts of our members than this hunter’s name. Always entertaining.
Lee Gook Joo - two words: dance battle
Jung Yong Hwa - Yong Hwa has a talent for variety and he fits right in with Running Man. He’s probably the only person who could become a permanent addition to the show and not have it be awkward. Plus, he’s great at challenges.
Lee Dong Wook - Dong Wook is really funny and he has amazing chemistry with Ji Hyo.
Jackie Chan - He’s hilarious and it’s fun seeing the others fangirl over him.
Noh Sa Yeon - what’s not to love about our tuna noona? She’s funny and fierce!
Kwon Ji Yong (G-Dragon) - there’s something about seeing someone who just embodies cool be dragged down to Running Man’s level. He faces everything with a smile on his face but you can’t help but feel that he’s wishing he were anywhere else in that moment.
Kang Dae Sung - Daesung’s chemistry with Jae Suk and his variety experience make him fun to watch every time.
Park Ji Sung - Captain Park took to variety like a duck to water. He quickly got over any awkwardness and formed a bond with the Running Man members, which feels truly genuine. The Ji Sung episodes are always fun with great missions.
Honorable Mentions - Moon Chae Won, Lee Seung Gi, Kim Enthusiastic, Choi Minho
Argh! I feel like this only scrapes the surface. Who are YOUR favourite guests?