I really hated that Niska didn't die horribly. He was such a good villain, I wish there had been more of him.
About Mr. Universe, I don't want to say I'm all onboard and thought it was the greatest idea ever or anything... BUT I did find it a unique and interesting sci-fi concept. And it looked cool when they were flying in to talk to him the first time, showing all the "signals" and whatever. As a character he was too goofy, but the concept I give props to.