Yeah, the title is pretty self-explanatory, but there's a little bit more to it than that. I don't mean noticing when your technique isn't working, I mean when did you get to the point in your training when you noticed EVERYTHING you were doing wrong (I think this happens after you've spent some time training, because I don't think beginners can see all the mistakes they're making). These things can include noticing that your legs are too far apart, your feet aren't pointed correctly, you aren't breathing properly, you aren't standing in the right place, you're forcing too much, or whatever. For me it's just started, I've been going to my class and just tearing myself apart noticing all the things that I've been doing wrong, and I always remind myself to take it back to the basics. So I started with our basic punch (in Taijutsu, this would be our Ichi Monji stance to a punch) and I immediately noticed that I put too much emphasis on my front leg, and I pulled my shoulder back too far before I punched (making all of my punches seem telegraphed). So I've been making sure to work on that at all times, and I've started to notice an improvement in all my punching, and any time I need to make a movement like a punch. So yeah, back to the basic question, when did you start to notice all the mistakes that you were making, beyond what the average observer could have noticed?