OSDev.org

The title says it all.
Personally, its writing drivers and making a gui.

My personal favorite part is how much it can teach someone.

For me it's doing low-level things such as implementing my own interrupt handlers, CPU structures etc... That we do not touch when we are just programming a simple application on an OS.

Knowing that everything is my code, seeing that it's possible to actually make your own operating system from scratch, and being able to try out your own ideas for operating system design.

Knowing there is no funny business going on in your code. This means a few things

The best thing it that I am controlling the computer with my way.

Is it just me or did everyone except for lkurusa express what's actually bad about OS development?

It's just you.