Thank you for your nice comment! Here is my current layout. It changed over the past three years and I can't say I put much thought into every key. Some layout choices developed through my coding habits and also coding in VAST Platform with Smalltalk in a legacy project. In the first layer everything is pretty standard colemak-dh layout. The print key I use often for screenshots on Linux. The Home and End buttons are very convenient for coding.

The second layer is my 'gaming' layer which has a kind of QWERTZ layout with random buttons assigned around it that I bind in game.

The third layer is for cough League of Legends. That was necessary because in that game you can't rebind the Space key and at the time that was my most played game.

The fourth layer is symbols and German Umlauts (ÄÖÜ) since colemak-dh doesn't feature those and I wanted them conveniently placed. The question and exclamation mark at the index finger position was such a great choice in hindsight, as well as the { } buttons in thumb position, since I use them very frequently while coding.

This layer only exists for music controls and the macro on the top left is just Alt + F4 since VAST Platform (the IDE I mentioned earlier), opened EVERYTHING you did in a new window and didn't accept Ctrl + Q to close them. Usually while coding you had like 20 windows open and pressing Alt + F4 300 times a day was too unconvenient for me.

My original writing speed was 70 WPM and it took me about a year to gain that back after switching to colemak-dh

Thanks