(From my perspective)....
Personality has a lot to do with new traders ability to grasp and execute market mechanics properly. What seems so natural to many of us long term traders, seem alien to new people. We try to explain conceptually the things that make stocks move and we try to show by example the "what is working".... and I have several of my top traders explain (from different points of view and background) the "how" of making money. We continue this in our various trading/mentoring groups.
Even with all this, a lot boils down to (yes) "personality" of people new to trading. For example, a CEO from a Fortune 500 company may "delegate" some of the learning process, or not bother examining the particulars of, say..."premium/discount" to FV and why the stocks will follow suit. They may not take the time to understand why pivot points work (often technical, always self-fulfilling).... and then the new trader who has taken some time to immerse themselves in the "why" of "how" things work...will learn more quickly.
It's almost like taking two different personality types (we have a dozen that I can probably define) starting any new business venture. They might both start a franchise in the same town. One might take the time to do traffic studies, ethno-analysis, bus routes, etc.....the other might just "assume" that these sandwich shops "should" make money because they paid for the franchise.
I sometimes get the "hey, I've been a MM or Specialist for 20 years" types that worry me to death, LOL. After trying to adapt to the extreme difference of not trading from order flow, as professional traders must do, and losing money...they either control their ego's and try to learn, or simply go away.
I do my best with all personality types, but honestly prefer the people who are willing to listen to established traders... those who don't expect too much too soon...those who understand that this business takes time, money, training, and "time in the saddle." No "paper trading" (except maybe for platform basics).. but real cash in the game type trading.
Some adapt quickly to simple mechanics and read the markets pretty well. Some look for automation, some do both. In my opinion, a trader must be multi-faceted, and know when to automate and when to simply define entry and exit points.
Trading is a business, and should be approached that way. No "rose colored glasses" but also, without "fear." Since my brother and I have been the "they" (as in "they" must know something)...and realize that there is no "they" - it is simply a business that must be learned. Don't overcomplicate trading, and don't try to rush your way into it.
From my perch....
FWIW,
Don