Same (excepting GOG, where I buy the game if they have it, but they usually don't). I'm so grateful to Steam for working on Linux that I actually feel good about buying games knowing it's a vote for Linux.

It definitely helps that it works (almost) flawlessly. If it stopped working well, I would stop using them, but with the current status quo it's a rare example of a company I transact with that I actually feel good about