I like all three brands a lot. Would probably consider myself a Nintendo and SEGA fan though. Favorite genres:

1. Arcade-style score attack (don't know if it counts as a genre, but it's a style of games I love a lot, and we don't see enough of anymore. Good examples: Galaga, Dig Dug, Asteroids, Tempest, Pac-Man, NiGHTS into Dreams, Crazy Taxi, Jet Set Radio, Tetris, Gradius, REZ)
2. Platformers, both 2D and 3D (Mario, Sonic, Rayman, Spyro, Crash, Ninja Gaiden (NES). Also Metroidvania style platformers and puzzle-platformers)
3. Action-Adventure (Kind of silly genre, since it can almost be anything, I guess some games just don't have a fitting label. Zelda, Shadow of the Colossus, Okami, God of War, Red Dead Redemption, Luigi's Mansion)

Also like a lot of third-person shooters, FPS, beat-em-ups, rail-shooters, arcade-style racers (not open world ones though), Fighting games (Although I absolutely suck at playing them),

Generally not a fan of RPGs, most of them are just too long and poorly paced, I do like a few though, usually the tactical ones.
I dislike sports simulators, like FIFA, Madden, NHL etc. I do like the more arcadey sports games though.

While I like a lot of offline-multiplayer games, I absolutely despise anything that has to do with online-multiplayer, or requires any internet connection in general. Only exception: Mario Maker.

I am a Nintendo fan these days, but I was a PC-gamer in the 90s.

My Top genres are:

1. turn-based strategy or tactics (UFO, Jagged Alliance, Civilization, Fire Emblem, Battle for Wesnoth, Valkyria Chronicles, Brigandine, Heroes of Might and Magic)

2. adventures - no matter if point-and-click or action (Zelda, Indiana Jones, Monkey Island, Oxenfree, Witcher 3)

3. isometric pause-based RPGs (Baldur's Gate, Divinity, Wasteland, Pillars of Eternity)

other areas I like are turn-based RPGs (Octopath Traveler, Child of Light), exploration in general (like Skyrim or Assassins Creed) and stealth in general (real stealth, not only options for an action game, examples are the original Thief or Gylt)

Nintendo / Playstation fan (Switch is current primary)

1. RPGs (western and Japanese alike)
2. Action Adventure
3. Strategy

Though I can be known to appreciate all types of games. I am very diverse with my tastes overall.

Mostly Nintendo fan, but I enjoy come Playstation games...

- JRPGs (Turn based and action)

- Adventure

- Platformers

Nintendo / Playstation
1) Platformer (Metroidvania > 2D platformer > 3D platformer)
2) RPG (Turn-based > hybrid action/turn-based (FFVII:R, Xenoblade) >>>> action RPG)
3) Action/adventure ( 2D slightly ahead of 3D)

Fighting games and first-person shooter would be fourth and fifth.

FPS
Turn Based Strategy
WRPG

Playstation
1)RPGs
2)Action adventures
3)Hmm.. do I really have a third type of game that I play? I'd love some point&click adventures but those aren't really a thing anymore.

1: RPG

2: Turn-based strategy

3: Car simulators

1) strategy
2) RPG
3) action/adventure

1- RPG
2- Turn based strategy RPG
3- Some other RPG type