Here are some of my favourite places on the internet. I've kept this strictly to sites I actually repeatedly visit. In some cases I link to a particular piece by the person in question, if I feel it stands above their more recent work.

Fabien Sanglard
Analysis of 90s 3D game graphics technique, the stuff they call "deep magic".
Jay Barnson
Game developer, Mormon. Now mostly writes genre fiction.
Jim Leonard
An old-school cracking/demoscene/retrograming head. Brilliant programmer with a taste for subversive culture.
A Dutch techno producer whose music I don't much like, but who has an awesomely 90s-feeling site packed with fun stuff like samples, synth reviews and artwork. Check out his zine too. 10/10 for attitude.
Liz Ryerson
Leftist, contrarian critic who's into Doom and music.
Loren Schmidt
Exuberantly original maker of games, figurines, concepts etc. She also likes things like lichen, caterpillars, cracked concrete and so on.
Mountain Man
Unbelievably cool old-school personal site covering spiritual, programming and general consciousness-raising topics in depth. Esoteric awesomeness.
My Friend Pokey
A blog written by Stephen Gilmurphy, who releases work as thecatamites and Harmony Zone. Critical, wide-ranging explorations of weirdness and poignant failures in game aesthetics and distribution. I very much like how this person thinks.
Nathalie Lawhead
Promoter, creator and historian of software that blurs the line between games and tools, commercial and amateur. You get the impression of someone remarkably forthright and intense.
Programming in the 21st Century
This is one I don't actually read much any more but I'll link him in thanks for instilling in me a positive, exploratory attitude to programming.
Robert Yang
Gay art-game maker who has written some top-notch cultural analysis of level design.
Scott Aaronson
Senior computer scientist and liberal. A large brain. Humanist and Jewish.
Shamus Young
A well-known content creator specialising in games programming, game reviews and D'n'D. Good vibes. Engaged in a touchingly hopeful attempt to steer a middle course between reactionary and woke elements of gaming culture, a bit like Scott Aaronson does in the academic world.
The Digital Antiquarian
Jimmy Maher is a digital culture historian who has done the world a huge service with his on-going superbly-researched history of gaming spanning the 70s to the early 90s.

Also, here are some newsletters I read (some of the time):

Avik Das
This fellow puts out nice pieces about different facets of interviewing for tech jobs.
Matt Stoller's non-partisan, very well-informed, power-to-the-people anti-monopoly periodical. Great insights into American capitalism and political workings.
First Floor
Thoughtful, progressive commentary on dance music with links to the tastiest recent releases. Shawn Reynaldo is a nice fellow.