Before I learned about GOG I bought all my games from steam.
Nowadays I only buy from steam if:
1) it's not on GOG, AND
2) it's a game I desperately want to play
I don't think condition #2 will ever be met, because no matter how hard I try to get addicted to video games I just get bored and do something else.
I buy from GOG because I like the idea that I actually own (not licensed, like steam) and can play the games I purchased even after game stores all shutdown.
And on top of that GOG is the home of CD Projekt Red, and we are able to buy their (awesome!) AAA games with the same freedom. I stopped blindly buying from Steam the day I realized what would happen to my games collection if they decide to cancel my account for whatever reason against their TOS. Not that I have anything against them by now, but if I buy, I own. Otherwise I rent.
Nowadays I only buy from steam if:
1) it's not on GOG, AND 2) it's a game I desperately want to play
I don't think condition #2 will ever be met, because no matter how hard I try to get addicted to video games I just get bored and do something else.
I buy from GOG because I like the idea that I actually own (not licensed, like steam) and can play the games I purchased even after game stores all shutdown.