I think too much of the time labels aren't really specific. Antagonist/not-nice covers a huge swath of things.
I find verbally aggressive asshole PCs to be entertaining, if they players are able to deal with being treated like an asshole/responses in kind ICly. (Which is, IME,definitely NOT a given. Even with a warning label about how they're such an asshole!). Physically aggressive PCs are fine with me to, but I'm a little careful with that now, because I dislike white knights who use every situation to jump in and "defend" someone before they have a chance to do so themselves or even get to play with the aggressor (one way that protagonist pc players in particular can become very ME ME ME ME scene dominators, actually!). Sexually aggressive PCs I'm very leery of. Not because I'm opposed to that (I'm neutral) but people who engage in rape drama on either end, or who need an audience for it, IME have been very problematic players in general. Not to say that I think everyone is, it just seems to be a strong majority, so I prefer to smile and nod around that. Insane/Extremely impulsive PCs can be okay and fun, as long as they don't OOCly freak the fuck out when ICly my PC declines to include them in sensitive/exacting stuff. (Also, unfortunately, not a given. Sometimes chaos is cool, but wanting sometimes there not to be chaos or escalation during an important mission is also a reasonable thing too, I think.) Budding roses who are really from the bottom barrel of onions are also kind of meh to me. (The people who desperately want you to peel back the layers of their PC because they're so complex and rewarding and won't it be enriching--but instead it's all about them and it's a little boring, and you'd better not ask for reciprocation, and instead of a complicated and wonderful story it's just kind of soggy/moldy and isn't good for much but to toss in the compost).