Feature request: personal notes on opponents

As a regular player, I would like to be able to make notes on opponents, to remind myself things like their style, preferred openings, attitude to the game, etc., so that I know what to expect.

I don't suppose the notes should be visible to anyone but me.

I think that's a good idea. There should be an option to make the notes only visible to yourself :)

Notes are only visible by the persons you follow, so normally it's persons that you trust.

I think its a great idea. I was searching for that feature.

I need to take notes on my opponent's style