Game developer opinions here!!!

Favourite: CDPR. Policy, awesome games, being DRM-free, and quality.
Hated: Digital Homicide, and I hope I really don't have to say why...

Troika Games and CD Project RED ftw, cant think of any bad ones i really hate for the moment.

like
bethesda - fallout/tes
blizzard - diablo 3
cdpr - witcher/cyberpunk
mojang - minecraft
relic - dawn of war

hate
none

I don't think Digital Homicide can be classified as a Game developer, maybe Shovelware dispenser.

I like Bethesda's games, but their business practices are greedy. They took quake legends, which had been free to play for years and decided to start charging for it. In the past they've raised the prices of their games just before major sales hit so sales prices are about the same as old regular prices. Recently they've recommended you go and buy all of Dishonored's DLC to understand Dishonored 2 better, and since Fallout 4 came out they've cut the sales price on nearly every single one of their games. Want to buy Fallout 1 to see the series' history? You'll pay $5 instead of $2.50 now for a 19-year old game. For comparison when Valve released Portal 2 they gave Portal 1 away for free.

like (that I remember)
Obsidian - Fallout New Vegas
Sid Meier - Civilization
Tripwire - Red Orchestra
Total War - Total War
Paradox - Hearts of Iron, Europa Universalis
Bethesda - Fallout, Elder Scrolls
KSH - Space Engineers
Gaijin - War Thunder

dislike
Reto-Moto - Heroes & Generals
Digital Homicide - rubbish

Most: Paradox Interactive
Least: can't think of one, so let's go with Digital Homicide

Microprose and Interplay (mostly Black Isle). If I need to say why, you probably need to get a 1Gb hard drive, install windows 98 and call in sick for about a week. Or a month. And the living developers? Hard to say, except for CDPR and maybe blizzard, everyone seems to have a couple of horse armor dlcs under their belts nowadays.

dont like to spend time actively hating on things.

Love:
CD Project Red
Obsidian Entertainment
Rockstar Games
VALVe

Disappointment me, witch is worse than hating as we all know :P
Bethesda Softworks
Ubisoft Montreal
Eden Games/Ivory Tower

Frictional Games <3 !

Paradox Interactive - cool people, who make unique games that I care about + they do business like I'd do it too (mostly).
Obsidian - best story tellers
Naughty Dog - best character developers
Blizzard - come closest to delivering perfect games

Outdated favorite: Square from the 90s

Least favorite:
None. I prefer to forget about the bad ones.
But I tend to avoid buying games from Activision. No real boycott, but I haven't bought more than 3-4 games from them within a decade.

Favorite: Valve. Huge innovators, take their time to innovate, defined the perfect physics engine, made Steam, Steamgifts exists now, all hail Gaben.
Least favorite: Who made Bad Rats?

Shigeru Miyamoto

Obviously I can't dismiss the big ones, like Bethesda or Rebellion (I'm a huge fan of Sniper Elite and Nazi Zombie Army), but I tend to remember smaller ones, like Devolver Digital and tinyBuild.

Favorite:
Rockstar
Bandai Namco
Level-5
Remedy

Least favorite:
Atari
That moment when Eden Studios became Eden Games,
Ghost team,
Monte Cristo
...list goes on

Hated:
Digital Homicide

Cyanide Studio \ Spiders Studios - I love their RPGs (Mars: War Logs, Game of Thrones, Of Orcs And Men, etc..)
R* - best open worlds ever
Bethesda
Bandai Namco