BY FAR! I DESPISE Pan and think that he's an absolutely TERRIBLE villain. So much so that I even wrote an article about it. Anyway, I like Hook (though I'm not crazy about him) and I LOVE the others. Rumpelstiltskin is my favorite, but only his Enchanted Forest version.

If you wanna know why I hate Pan, read my article: link

I thought he was okay back when he was a villain, but he was both not very smart and not very powerful, which resulted in his constant manipulation by the other villains and made him less interesting to me than the others. I did like his backstory with Milah, Rumple, Bae and Pan though.

Once again I pretty much like them all.

I've never seen Once Upon a Time in Wonderland but I think Hook never made for a very compelling villain. I was admittedly biased because I always thought he'd turn into a hero but I can't really picture him as a villain. After that would be Hades. He was kind of disappointing to me after everything. I think Rumple and Pan were much more exciting and involved villains that kept the story more intriguing. Hades was wounded as a villain because of the timing with everything going on with Zelena. I think I would've liked him more if we got to see him longer as I felt his potential was cut too short.

I despise Rumple.

He reminds me of those empty-headed cocky guys in high school; acting all macho, but in reality no balls between their legs.
Petar Pan is the lamest villain. He is selfish just like Rumple, but at least rumple is very clever.