Thank you, and I apologize for the wall of text. Humble Bundle has been great throughout this experience, even if they ultimately were not able to get the DRM-free copy to work. Which is not really their fault, they only distribute the game and would need a working copy from the game developer.
Regarding DRM, it's a diverse number of smaller problems rather than one big one. Provided the DRM is not overly invasive, I do not actually mind DRM per se.
One issue is that I have a very old, low-end PC, and various game clients can consume a considerable amount of my CPU resources (could be as "low" as 20% going up to 40%, depending on the client) which makes some games that would be playable without the client unplayable, and lowers performance overall. Ultimately it's just a nuisance; once I have proven I own the game, I should be able to close the client and play without it. That's my opinion, anyways.
There are privacy concerns; I don't overly like always-on DRM that is constantly reporting back information to game developers, especially for single-player content. I understand that for the most part this is to help improve the game, but I don't feel it should be forced on the customer.
Most (if not all) companies now having clauses in their terms of use that let them unilaterally update the terms to whatever they please, and force you to either accept the terms or lose access to all your games. Not to mention the clause that lets them take away your games or terminate your account for no reason whatsoever. Not that I expect it to happen, but it's very anti-consumer and frankly kind of bullying.
If for some reason my Internet, or the company's servers, are down any game that requires authorization or always-on DRM will be unplayable.
Then there are forced updates. I have had multiple, single-player games that worked fine on my PC until a forced update was released that broke the game. It's one thing for multiplayer games to require updates for balance, anti-cheat, etc. but breaking single-player content for paying customers and refusing to let them roll back to a working version is just being a jerk.
Ultimately, even though I know I don't own the games (only a license to play them) the knowledge that I can back up a working copy of a game and play it forever is comforting.
Sorry, that was another pointless wall of text.