GOG vs Steam

So Steam or GOG, which should I get?

I don't play PC games but will be by the time this thing rolls around. 

I'm going GoG just because i have quite a few games from them already and only a couple on Steam. Plus i like the fact they're DRM free.

the only "risk" i see is that GoG may not have the lasting power of Steam. I don't know if game sales is their only form of revenue generation for GoG. Steam (Valve) obviously has other ways of raking in cash... though maybe Steam is now their primary income source

according to: www.gog.com/galaxy

GOG GALAXY is a fully optional client to install, play and update your games. It also offers online multiplayer, achievements, chat, game-time tracking and more - but it’s up to you which features you want to use.

it seems GOG can provide game patches.

You can add non steam games into your library, but they are not supported by Steam.
It also won't show up on any computer you run your Steam account on.

I'm getting both, by the way.

that's true, I was just pointing out it's possible. How often do you use steam on foreign computers anyway? I plan to keep my GoG version in the thumb drive that's on my key ring... So the game is always with me=)

Want to ask, if we get the GOG version with the exclusive backer edition,
can we keep downloading the content over and over again? because the exclusive backer are considered as DLC here

I hope so
So I can make a backup to my external hard drive

Back when I was in college, I didn't really know what Steam was, but the other people in my class used it and would install it on the school computers and play their games. You could theoretically do this at a library or something too.

Or you know, at a friends house, or whatever. Maybe you didn't realize you were going to be somewhere for as long as you were, and now you really wish you had brought your game with you, but you didn't (maybe you lost your thumb drive), however there's a gaming computer around and you have the perfect method to play the game.

GOG is run by CD Projekt RED, the developers of the Witcher games, so they have other means of making money. In fact, The Witcher 3: Wild Hunt is selling better on GOG than on Steam.