While I agree that mental state must have an effect on playing, it is hard to diagnose at what point is your mind working for or against you and to what extent.
@joebegly also raised this aspect, stating mental fatigue, but it happens even if I’m mentally happy and feeling fresh. I put a bucket load of time into the cliffs solo, but it wasn’t like thats all I was playing. The point is that I felt like I had already had some victory over that solo and it was something that I started to use as a jovial break from whatever I was working on at the time - it was a friend, not a threat.
But you do raise an interesting point about obsessive and I do wonder whether I have reframed obsessive or habitual behaviour as ‘fun’, when its not really.
I have seldom felt that practicing wasn’t fun - its an escape and can be freeform or rigid in structure, but right now I just feel like I want to feel some reliable results once even if the improvement is incremental. I don’t have an enormous amount of time available in my life and I know that I can’t be the best improviser, composer and or even an ‘original’ sounding player all at once and that doesn’t bother me greatly.
Please don’t get me wrong, I have made improvements over a longer span of time and CTC is the most significant factor in that.
I wish sometimes I was into something like Coldplay…guitar life would be simpler!