As a resident (but not a citizen) of the US, I'm well aware that GOG puts me through less bullshit than those from other countries.
The one principle that I really care about, which GOG has more or less stuck to well, is the lack of DRM. Buying ownable products instead of "services" is why GOG remains one of the few digital storefronts I still shop at. The whole thing with DEFCON is troublesome, but at least more than 99% of the things I buy here, I can download an installer for it that won't disappear or stop working if GOG suddenly dies. Another important thing to me is that they still have a degree of quality control, regarding releases (even if it's
[url=http://www.gog.com/game/paranautical_activity]perfect by any means).
One principle that I find important, which GOG is utterly failing at though, is non-censorship. I think it's complete bullshit that an international storefront in Poland won't let Germans buy a digital copy of Wolf 3D, or let Australians buy Hotline Miami 2 - especially while they still sell Postal 2 to New Zealanders. The continued lack of an uncut version of Fallout also irks me - and their decision to not allow Hatred on the store is a bit hypocritical, considering the kind of games they've released before and since.
I'd say GOG is far from perfect, but it hasn't yet mutated into the cancerous, cynical, apathetic wretch that Steam has become - so for the time being, I'm okay with this storefront.