I lack the examples and I have to do some research but I'm almost sure some stands were created based on someone's abilities and weakness
Edit:some stuff I found
the stone mask gives stand like abilities by piercing the brain at some points
stands are made of hammon
hammon needs breath and comes from the bloodstream
but also only people who felt pressure from harsh situations can use it
only a small part of the humanity can use it
I can understand Joestar link but stone mask never gave stand anyone - Dio had a mask and did not have a Stand until have been pierced with arrow , and Stand abilities are not hamon most probably , Joseph used both Hermit Purple and hamon on it , how can you use hamon on hamon then ? And stands does not require you to breath .
I mean genetics has some things to do with it
by "influenced" I do not mean in the way the arrow does but in the way the user personality does
You mean that by getting Jonathan ' s body Dio ' s personality changed ?
a stand that shoots and that can rotate the fingernails before shooting instead of a fighting humanoid
totally made for him with the steel ball in mind
Gyro and Diego had their legs all right yet all they got where turbo vision and dinosaurs making . Johnny ' s Tusk evolved with every lesson from Gyro , so in my opinion it makes sense . His final version was created by infinite rotation , and it was even humanoid , though still shot as fingernail .
with everything that changed and Pucci supposedly being the creator of this universe, it's hard to take it into account (I didn't read part 6 I might be messing up stuff with pucci here)
looks like the original universe with malfuction
looks like the dimensional stuff Vallentine does can only affect neighbor dimensions wich have the same "malfuctions" with only the base world having broJesus (I will never forget Jhonny and Jesus bro talk)
Pucci did not create this world , he only accelerated time to point where our planet synchronizes with one exactly the same one somewhere on the other end of universe making it possible for humans to know their whole lifes and futures ( or something like thattt ) but Emporio kills him so the world is incomplete so it ends up in new world similar to the old one , where people who died where replaced ( which might mean that for example Johnathan was replaced by Johnny and Dio with Diego ) which in my opinion means that the whole past was changed ( people from the past are dead ) and as well is the Future .
I would not agree with Valentine thing though I thought the same way for longer time - but if they have the same malfunction then how one Diego can have The World ? And basing on that what I said the old world is also the same world with malfunctions . Though now that I think about it if Johnny is not Johnathan them maybe Diego killed Johanthan alike person ( killed Irene instead of Jolyne killing this way original Jolyne ) and used his body to have The World ?