I presented a number of studies, and while you should critically examine each one, you're just looking at one. Second, my goal was to establish that I am certainly not alone in looking for similarities and seemingly finding some. For this I have been chastised, I don't believe that's fair.
As an individual (rather than an authority figure), I have probably intervened in more bullying events than anybody in this thread because I despise bullying. When I suggest for victims to look inward, I am doing so in an effort to reduce the bullying they have to endure. While I may be totally wrong in my theories, my heart is in the right place. I happen to believe that avoidance as a first resort is wrong, but I don't look down on people who suggest it because they, like me, think they are helping. With that said...
Let's take this a step further (or backwards). There is by definition some similarity among many of the victims. This is due to how bullying is defined, which I concede is not a universal definition. However, I think it's fair to say that when you take an act by A towards B, how they react to the situation affects whether it is called bullying or not.
I've been trying to think of when I was ever bullied. As I have pondered this, I think there were a few attempts I may not have considered as attempts at bullying. For example, I was a quarterback in high school - tall, strong and fit, but not nearly as big as say a defensive lineman. One of them ("Bill") was an all-county wrestler in the heavyweight category. He was clearly bigger and stronger than me, so right there we have the imbalance of power element.
One day in the locker room, Bill started riding my ass for some strange reason. I mean, I'm a likable guy, right?

I believe I received a shove or two - nothing "violent" but definitely physical aggression of the sort routinely seen by bullies. Well, rather than let him dictate where it was going, I took it up about three more levels, and we got into a pretty nasty fight that took several people to break up. It was a good thing, because in the limited confines of the locker room he had an advantage. I hurt him way more than he hurt me, which was really only a factor of time since had we been alone, he would have crushed me eventually.
Based on everything I have read, that would
not have been classified as a bullying event by researchers. It would have been considered just a fight. I would have been considered a non-victim. Thus we have at least one similarity, which is taking actions to restore the balance of power in some manner or at least make the act unpleasant for the bully. Or stated another way, maybe the similarity is not so much with the victims but with the non-victims.
As I was reading the research, it brought back memories of the "provocative" victims. I remember one I wrote off as a lost cause because from my perspective he was, in fact, "asking" for it at times. Not all the time, but there were plenty of times where he, for lack of a better term, would poke the bear. He suffered more bullying than anybody I ever saw. It was so bad that he was actually made to leave class five minutes early to go to the next class because it was simply not safe in the hallways for him. And yet this kid would mouth off to "bullies" who were ignoring him. Rather than passively take it, he would "freak out" so bad it was almost like a bad Saturday Night Live skit, so people actually found it "entertaining" in a way that watching the shy girl with braces and no boobs get teased in gym class was just sickening. I consider him to be an outlier, and I can think of no way to help a kid like that short of counseling, which he did receive.
Side Note:
As best as I can tell, this guy ended up "running" for governor in Maryland on a platform of general amnesty for all prisoners, distribution of weapons to the common people, and Maryland's secession from the union. I point this out because I'm sure some folks will look down on me for calling this kid a lost cause.
There were other, far less extreme examples. As a bigger kid (bear), I remember smaller kids, almost always guys, poking me (to use a metaphor). I pretty much ignored them because I was taught growing that with "power" comes the responsibility to use it wisely. I learned early on that authority, real or perceived, will always be challenged. It should get no more attention than it deserves, which is usually not much.
I recall those same kids periodically getting into scraps with bigger kids and losing, sometimes repeatedly. More often than not the response they got from the bigger kids was out of proportion. And quite often they would end up in a "dance" that lasted weeks, months and even years. Is that bullying? Hard to say, really. Sometimes the bigger kids would instigate it knowing full well the outcome, and that, to me, is bullying. But is lightly poking a bear and getting mauled bullying?
I hadn't really considered those victims in my posts, but after reading up on bullying, there does seem to be, for lack of a better term, a
class of victims that loosely match what I remember. I wonder how some of those guys remember things. Do they believe they did nothing whatsoever to contribute to the situation? Would you (generic you) consider them victims of bullying? Personally, I'd say some of the times they clearly were victims while other times they were just being annoying little pricks annoying people who don't react to it well.
In this forum we have heated debates on whether a cop bullied somebody in a situation. Some people argue that (say) the teenager was being an obnoxious little twerp to the cop and got what he deserved while others say that smacking the kid on the head and breaking his skateboard was a huge overreaction by a cop with a gun on his hip. I tend to argue that cops are too aggressive and should be secure enough to put up with a little lip. Others think that those in power (not just cops) should always be treated with the utmost respect.
Just food for thought.