I've played TF2 since it went F2P and I loved every moment of playing it back then (and still do), so much so that I became a PC gamer after using an Xbox for so long and only because of how much I loved this game.
But I owe so much more than just my PC gaming habits to Team Fortress 2. TF2 was a masterpiece of game design and inspired me to learn more about how to create and code my own experiences for people to enjoy as much as I had enjoyed TF2. I don't think I'll be able to achieve something as great and with such a legacy, but I do appreciate the resources Valve has given to not only enjoy the games they make, but learn how they work in-depth and help make your own games and other software.
I know we're all waiting for a great update on the 10th anniversary and we're worried if Valve can deliver. However, I believe our very worry is a testament to how great and capable of a company Valve is. If Valve were a bad games studio, we wouldn't be here discussing it among ourselves, nor would we even be expecting another great free update from them after a decade.
It's amazing how far we have come, with Valve and through our own community alone. Here's to another 10 years. We have both the game and community to take us there, and I'm excited for the journey we have ahead of us.