Exactly,in 2k11 when they did the press conferences it was up to ME to decide whether to be the super nice guy,angry guy,arrogant guy,etc....basically I determined my own personality.The only thing I wasn't a fan of was being able to demand trades over and over with really no significant repurcussions.
Even in 2K14 you had a measure of control over your personality in cutscenes, and it affected team chemistry in a somewhat meaningful way
In 2K15, I could be Mr.Nice Guy all I wanted, my dude was STILL going to whine about being undrafted, "textgate" will STILL happen, and he'll generally act a bit annoying regardless of my choices.
The core issue/debate comes back to what i've mentioned before:control.
Generally, I think people want as much control as possible when it comes to a character they created themselves,not being railroaded into situations that can often seem contrary to how they wanted their character to be portrayed.for the sake of story.

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