Badass always! Likely because villains are usually badass and I usually shoot for villains.
I also love characters like Selene (Underworld), Alice (Resident Evil), and Furiosa (Mad Max). I just tend to prefer them aesthetically and personality-wise.
Nice characters can actually be kind of annoying to me. Like characters like TyLee who are just super bubbly and happy go lucky. It really just depends how they are written tho.