I voted for Leonid Kravchuk since he led Ukraine to independence and thus indirectly caused the Soviet Union to collapse.
Which is definitely a horrible thing. The collapse of the soviet union and the eastern blocs, have caused a lot of people's lives to ruin, and further wars around the world, with not counter-reaction. Post-Soviet Ukraine has been not so good, with ridiculous political divisions and horrible leaders, but I like Yanukovych the most, due to his defiance, not the best but like him the most.