Most Serbs are descended from Montenegro or Herzegovina (Montenegrin twin sister) and if they exhibit these traits it is because of that. Authentic Vojvodina (or all of Pannonians) people do not have these traits. Yes, Montenegrins do have them more exaggerated. Nature means that it is of genetic value as I remember kids as young as possible exhibiting them.
Some additions
X - Montenegrins, each want to lead and none want to follow.
X - Situation, a villager is looking at his rich neighbors house.
-Serbian: I hope I can make a bigger and better one then him.
-Montenegrin: God, I hope a misfortune befalls on him.
X - Montenegrin mother to her young son
" I
better not see you cry again, go back there and kick his ass or are you a girl!!!"
(*Compare a more extreme example of a Spartan mother telling her son in a war "Either on the shield or with the shield")
X - Montenegrins are very hard to get along (do to the fact that they have a free spirit) and have had very bloody civil wars (*again comparable to Greeks where Macedonians wipe out Thebes for example).
X - Montenegrins are by nature strict and merciless (in a war for example).
X - Montenegrins also have no tolerance for stupidity (viewed as a form of weakness).
X - Montenegrins go by ability to keep ones word as one of measures of honor (another being not promiscuous, especially for females) .
X - For Montenegrins honor of close female relatives is paramount.
X - Montenegrins are extremely picky as far as who their mate will be and family history (history of 'sickness') is taken into account.
(* centuries of selective breeding as with Dorian Greek Spartans over 2000 years ago where weak was discarded)
X - Montenegrin males are expected to volunteer in a case of outside threat (war).
X - Montenegrin males were not considered fully men until the time they served military (which was seen as biggest event in the life outside of marriage).
X - Montenegrins are often armed to the teeth (men often carve out their peaces as if it jewelery)
X - Montenegrin weeding is accompanied with frequent shoots from various weapons into the air.
X - Montenegrin girls are also expected to be be strong, smart and aggressive (in fact in old times one of the traditions was that when it was time to get married you would go to the next village under the cover of darkness and ride a horse and kidnap your future wife who was supposed to resist you while her relatives are chasing you) for without such women no child will turn such (strong, smart and aggressive).
(*Again compare to Spartan Queen replying to Persian Messenger that only in Sparta do women give birth to REAL MEN)
X - Montenegrins are not romantic (feminine trait BTW as you are showing how gentle you are by doing it) by nature but come from a ultra-macho society nor are the expected to be from their women (in fact they might be suspected of cheating if they ever would exhibit it). Also Montenegrin women (unless younger) are too mature and logical and read through the false shadow called romance.
X - Montenegrins are gifted as orators also older males like to philosophize in their daily conversation.
X - Montenegrins often talk what I call 'code' or uncomplete sentences that they expect the other party to understand without them being finished (assumption is that the other party has intellect to do so).
X - Montenegrin parent will always assume that their child is too good for whomever is the mate of that child (and that mate better not be very sensitive) .
X - Montenegrin female gains in 'value' in the eyes of community with age and after childbirth (desired child to have is always a boy).
X - With age Montenegrin women appear more aggressive while males mellow out in comparison (males as a rule avoid arguments with restless females as much as possible and a result hand out with other males as much as possible while females hang out with other females).
X - Montenegrin society is predatory in nature and anything 'sheepish' is not respected.
Montenegrin Romance ;D
* Montenegrins are very similar to earlier NW Greeks (so called Dorians as were Spartans, Epirots and Macedonians) in culture, mentality and race.