Quite a few years ago (back in 2014) I started the "Favorite Batman villains?" thread:and included the following villains to choose from:
* Bane
* Catwoman
* Clayface
* Harley Quinn
* Hugo Strange
* Hush
* Joker
* Mad Hatter
* Mr. Freeze
* Penguin
* Poison Ivy
* Ra's al Ghul
* Riddler
* Scarecrow
* Two-Face
Now, here's a new list of 15 more Bat-villains to choose from:Black Mask
Carmine "The Roman" Falcone
Doctor Hurt
Doctor Phosphorus
Firefly
Joker's Daughter (New 52 + version)
(Killer) Croc
Killer Moth
Magpie
Maxie Zeus
Mister Bloom
Professor Pyg
Rupert Thorne
Ventriloquist & Scarface
Victor Zsasz