Badass Decay — Saint Dane oddly is nowhere near as scary when he's holding all of the cards, possibly because a lot of his creepiness comes from good ol' fashioned Paranoia Fuel - Saint Dane can be anyone, anywhere, at any time. Once he's won, he really has no reason to hide, which means the Travelers pretty much know where he is at all times.
Complete Monster: Very much so for Saint Dane. When your plan is the same as Darkseid's, and with the same amount of malice, you end up like this.
Durgen from Black Water is a pretty nasty character. He's needlessly cruel to the Gars, more so than the rest of the Klee's, even when he finds out they're intelligent, he still proves to needlessly sacrifice their life, sometimes for sport. Not to mention the near torture he puts Bobby through in the Gar Stables.
Seasonal Rot — Many consider the last three books, as awesome as they are, to be terrible compared to the ones before.
Epileptic Trees - a somewhat common speculation on forums what was all the territories would turn out to be Earth. Despite the fact that Eelong is in a star cluster and Denduron has three suns.
Misaimed Fandom — Those who love Saint Dane despite his monstrous villainy rather than because of it. It's safe to say that a lot of fans wanted him to win at the end of the series. Also, some love Nevva Winter even though for a while she's almost as much of a monster as Saint Dane.