Don't like them. Same with colored hair, piercings, dilations and all that stuff. It can have a pass if it's something small, but I still don't like it. I love natural looks and all these things are the complete opposite.
Big or small I don't really care, but make them look natural. For nipples and areolas I do have a preference: big and juicy, in proportion to the boob.
As a kid Espeon was my favourite. When Sylveon came out I really disliked it. But I lived long enough to become a Sylveon enjoyer and is now my favourite.
The ones that blast you with obnoxious music and sound effects with a long-ass start up intro. Having to ctrl skip to the main menu is not a great first impression.
Villain I guess. I mean no harm to anyone, but I would mainly use that for personal gain, trying to not make other people's life worse in the process. I would only try to make the world a better place as long as it doesn't mean going out of my way to do so.