I’ll go first.
Dear Linus Torvalds,
Thanks for all your hard work on Linux 
and git. Your focus and ability to not be distracted by all the shiny new gadgets in the world is a great asset to us all, and sets an inspiring example. Thanks for making a iron-willed stand for what you believe in. 
Linux (as in, Debian, Ubuntu, Linux Mint) was the only thing I found rewarding to learn (in a longer term sense), and sort of hitch my wagon to, having gone to university and obtained a computer science degree. After uni, I was able to work in the IT industry for about 6 years, always heavily centered around Linux, and that income really went a long way in my life to fulfilling my life dreams. So even though you don’t know who I am, you’ve made a big impact in my life, far outside the realm of computers.
I hope some talented documentary-maker (backed by a team of talented artists) one day captures the essence of the whole ecosystem you’ve been very helpful towards setting in motion. I feel the story hasn’t been truly told or revealed in its essence yet. 
Please don’t die anytime soon,
Esbeeb 