Familiarity is comfortable, but variety is a great spice.
By the way, if you're looking for a place to visit in Japan, Takayama/Shirakawa-go is a fantastic place to go.
I've been all over Japan, but I loved the scenery and the sights. It's a rustic, picturesque place.
For a sight closer to Tokyo, Nikko is a great place to visit; in some ways the main temple is rather gaudier/more elaborate than Kyoto.
In contrast, Kamakura is a nice day/weekend trip from Tokyo, but if you're going to Kyoto it's not necessary to include on the same itinerary.