SMG
RRV

In the recent months it was mainly Rage. I just dig the art style and setting of the game. It looks great in 4k.

Streets of Rage 2

Arcade racers
Some RPGs
Shmups
Beat em Ups
Action RPG side scrolling beat em ups like Guardian Heroes,Dragon's Crown.Dungeons & Dragons Mystara etc
Shenmue
Diablo
Most Arcade games
Hack n Slash
Some Platformers
Fighting games
Character Action games
TPS games

Only 8/16-bit games. Once we made the jump to 3D, story based games it was just... idk. I have played only a handful of them over the years more than once. They just get less and less interested every time for me.

I can play the first SMB or Zelda though over and over again for the rest of my life and still have fun.

<<< that game

Mario Galaxy games
Paper Mario: The Thousand Year Door
Kingdom Hearts
Fallout 2.
Baldurs Gate 2.
Final Fantasy games.

^all games with great replay value.

Pretty much every Fire Emblem game, but specifically Radiant Dawn. I've replayed it 40+ times. Not joking.

Other than that, it really just depends on the game for me. I've replayed SMT IV once, as well as Devil Survivor 2. One game I played a SHIT TON of when I was younger was Final Fantasy Tactics A2 Grimoire of the Rift. That is still honestly one of my favorite games ever.

I've replayed Skyrim a few times. As well as Tales of Symphonia 2.
Currently more than halfway through on my second playthrough of Digimon Story Cyber Sleuth

I want to replay Witcher 3, but ugh I want it on the Switch lol. (Ik it won't happen)

Otherwise I just play a lot of Mario Kart, Splatoon, Rocket League, Smash Bros...

I have a couple games that I've been playing continuesly pretty much since they released, they'll never get boring;

Rollercoaster Tycoon 2
SimCity 4

A third that'll never get boring is Anno 1602, but playing it has been on hiatus for a while now since I used to play it over LAN with a friend, but modern hardware doesn't agree with it sadly.

Then, there games that aren't endless, and I won't get tired of, but only play through them every once in a while. Could be years between playthroughs though, but when I do play through them I'll have a blast. These are my top favorite games, along with a bunch of Zelda games;

Zelda Ocarina of Time
Star Wars Knights of the old Republic
Mario 64
Zelda Link's Awakening
Zelda Twilight Princess
Zelda A Link to the Past

I play a lot of Gears of War, the whole series.

Whether its multiplayer or just playing campaign, I really enjoy the gunplay. I don't think there is a better 3rd person shooter.