A few random observations:
When I bought my first camera, an ME Super, I was a bit paranoid about using it because of the thought of people thinking 'who's that poser with a fancy camera who clearly knows nothing about photography?' which was not good for my photography. It would have been worse with a Leica.
I've tried never to buy a new camera until either the one I use breaks of I feel that it's shortcomings are holding me back in some way.
When you're in the moment and your actually using the camera, you're just glad to have one with you.
When you get back and see the pictures you've missed you will be annoyed that the camera didn't make up for your shortcomings.
For the same photographer and the same vision (remembering Ansel Adams and his sharp picture of a fuzzy idea) a better camera will usually result in a better image - but an inconspicuous camera might result in better images on the street etc etc.
I now try to take th best pictures I can with hat I've got to hand and try to forget about image/psychology