Best Kes episodes are "Cold Fire", "Persistence Of Vision", "Warlord" and "The Swarm".
In "Cold Fire" and "Persistence Of Vision", Kes uses her powers to save the ship. In "Warlord" her body is taken over by a hostile entity but she continues to fight against it and finally breaks free with the help of her friends.
In "The Swarm" she comes up with a brilliant solution to save The Doctor.
"Elogium" has some good scenes with Kes, even if the story is a bit thin and makes the Ocampa look weird.
"Time And Again" shows Kes's starting to be aware of her powers and "Before And After" is an interesting, but a bit weird episode with flashbacks of her early life.
There are also good Kes moments in episodes like "Caretaker" (I love her speech to the leading Ocampa Toscat), "Parturition (her discussion with The Doctor about Neelix and Tom Paris is hilarious), "Projections" (when The Doctor thinks tha Kes is his wife), "Tattoo" (when she plays a trick on The Doctor), "Phage", "Learning Curve" and "Jetrel". She also plays an important role in "Scorpion".
More information about Kes at The Kes Website (link below).
