No! Yes! No! Yes!
Maybe.
If the game system isn't transparent, if I don't know exactly what benefit all the stats will have then I can't make a reasoned decision about what to increase and I might as well leave it to an automated system.
If the game system is suitably transparent then I can make these choices and I probably will, simply because I won't trust the system not to make poor decisions on my behalf.
If the game system is well balanced or I do trust the system to make effective choices then I probably would end up using it for picking my stats. Stat assignment is one of those things that involve a lot of decisions but few or no choices and doesn't interest me as a result.
I'd never auto-assign skills though, if ever I am disengaged enough to auto-assign skills then I'm sure to quit soon after anyway.
