You know when you’ve been playing for about 45 minutes and you start to notice every little detail, everything you get right and get wrong, but you don’t really react to it? You just keep playing and notice everything?
That is a very aware, flexible, and non-judgmental state of mind. Be aware that you can also space out and go on auto-pilot this way. It’s a delicate balance. But if you go for what sounds good and explore it, you can improve your playing and be completely immersed in it at the same time.