Looking back at VOYAGER, there could have been a lot more done with several villains/antagonists. There are basically just 6 recurring villains... those who appear in 3 or more episodes. I didn't count the Krenim because the crew technically only briefly encountered them once. We did get a LOT of one-offs, and I get why this occured. But I think there was a lot of potential in delving into some of the recurring ones.
On this list, who do you think was the most interesting?
(Personally, I went for the Vidiians. They had a built-morality dilemma, and they looked creepy as hell.)
Actually, the Vidiians made no sense. If they had the technology to do what they did, they would have the technology to clone the organs they "harvested", and there would be no need to roam space harvesting more. Actually, they could just clone healthy Vidiian organs from uninfected Vidiians. Plus, the "Think Tank" cured the Phage. Interesting idea, but it falls apart if you look too closely.
I've written a lot about how much I hated the Kazon and how I think that their profound ugliness and unlikability hurt the show in early years. Klingon, Romulan, Borg... intresting adversaries that on some level you want to learn more about. Even the Dominion, Vorta and Jem Haadar. Kazon? Nothing more than violent and hostile to everyone including themselves. Ugly inside and outside. No redeemable qualities whatsoever. Even the Borg didn't want them.
So, my vote would have been "None of the Above". The Borg may have started as "Picard's foe", but by the end of Voyager, "Janeway" owned them completely. And they were ingrained with the series to the point I don't thnk you can really call them "Foes" in the same sense as the others listed.
Malon? Hirogen? Once was enough IMO. Too much Hirogen, actually, but I applaud the concept for being somewhat original, and sometimes scary as hell.
I guess I liked the fact that for the most part, the "foes" came and went quickly. They were supposed to be moving through 70,000 light years of space, and that made the most sense to me.