WolfpackN64 on 11 August 2017
GOG first then Steam. Steam has the most to offer, but GOG is just more of a pleasure to use. Whenever I can, I buy my games on GOG. That they're DRM free is a bonus.
Usually, Linux compatibility is also a criterion for buying games on GOG (one reason why the Witcher III isn't in my library yet). And if games don't get ported, Wine compatibility with GOG games is often just a bit better than with Steam.
