Turns out I am greedy. Not for money, as I usually have enough thanks to my parents and workaholism.
I am greedy for new hobbies, projects and ideas. Once there is an opening in my schedule, I'll immideatly try to fill it with something, whether it be a coding project, lab work or new piece of writing.
Yesterday there was a moment where I caught myself and gor an upper hand: instead of putting "outline new article" on a todo list, I left the line blank. A small yet important victory and a step towards a more sustainable life.