What is your favorite KBO and which one (in particular) do you wish we had more data on or visit? Or anything else related to KBOs.
My favorite is 90377 Sedna (aka Sedna). Its highly-eccentric orbit intrigues me and could be indicative of another transneptunian object that could be perturbing Sedna's and other KBO orbits.
Sedna is featured in Temperature Comparison as one of our Solar System's coldest objects at -240 C.