[Dimitri]

The Rayman series, Super Meat Boy, Azure Striker Gunvolt, Hotline Miami, Cave Story, Portal series, Half-Life, Ghost Trick: Phantom Detective, The World Ends With You and the LittleBigPlanet series

Oh man, Rayman, Portal, and LittleBigPlanet are pretty much my top favorite series's, and out of those other games I know I'd probably love most of them if I tried them.

My personal favorite games though, out of ones I've actually finished, would be a few classics like Rayman 2, the Spyro the Dragon series, along with some newer stuff like the aforementioned  Portal and LittleBigPlanet, Minecraft, Dust: A Elysian Tail, the Sly Cooper series, and... That's about it actually. I'm not good at finishing games. 

[Cobra!]

Well, I love the Little Tail Bronx games! (Tail Concerto and Solatorobo! )

I also love the Tony Hawk games, and I'm looking forward to getting Pro Skater 5 for Christmas! Even though I haven't heard much about it since it came out, combining that with Robomodo's (the new developers of the games) bad track record (Remember how awesome Tony Hawk Ride was? ... yeah, me neither. ), I'm assuming the game isn't great, but it's a new Tony Hawk game, and I have a tradition for getting the latest Tony Hawk game for Christmas, so it's mostly for old times sake! 

Other games I love include Shenmue, the 007 & Perfect Dark games, Sunset Overdrive, the Killer Instinct games, the Banjo Kazooie games, WipEout, Outrun, almost any 90s Sega Arcade game and tonnes of wrestling games! 

[VikVanHazel]

Keep it mind, some of these are what you would call a "guilty pleasure" game. (Guilty pleasure, in this context, is something that is not very good, but I still enjoy for whatever reason.)

• Doom 2
• Cave Story
• Donkey Kong Country (series)
• Castlevania (series)
• Metroid (series)
• Bunny Must Die
• Unreal (not to be confused with Unreal Tournament)
• Xargon
• Duke Nukem 3D

There is probably more, so don't be surprised if I make a followup post.

[Braixen]

DEFINITELY LITTLE TAIL BRONX.
I also like Freedom Planet, The Underside, Yo-Kai Watch (ASSUMED), Animal Crossing, Rune Factory (If I didn't know any better I'd call RF4 one of if not THE BEST game), Cave Story, Rayman, Portal, LittleBigPlanet, AND OTHER STUFF.

[Cobra!]

Keep it mind, some of these are what you would call a "guilty pleasure" game. (Guilty pleasure, in this context, is something that is not very good, but I still enjoy for whatever reason.)

Oh yeah, I have quite a few guilty pleasure games myself, here are some awful games me and my friends love playing:

Rise of the Robots (Mega Drive and Amiga CD32)
Rouge Warrior (PC)
Corpse Killer (3DO)
007 legends (Wii U) (I also have it on PC, but it's actually decent on that in my opinion)
WCW Backstage Assault (PS1)
WWE All Stars (PS2) (The 360/PS3 version is pretty good, I think, but the PS2 version is god-awful, it wasn't the best goodbye THQ gave to it, especially after giving it such a good port of Smackdown vs. Raw 2011!)
WWF Attitude (N64 & Dreamcast)
FIFA 12 (PC) (Who didn't love the impact engine physics?)
FIFA 14 (PS2)[/list]

[Chocolat]

Aside from Klonoa 2, Banjo Kazooie is my favourite game ever made. That game is literally perfect and would be above Klonoa 2 if it wasn't for personal reasons.

Other best games:

Mother 3 (Best story in a game)
TES IV: Oblivion (I guess this is my token guilty pleasure game but I really like it)
Sonic CD (Best Music in a game)
Melee (Been playing this for years, other smash games are good but none could replicate how fun and replayable melee was)
Spyro 3 (PS1 Banjo Kazooie, few annoying minigames but otherwise near perfect as well)
Undertale (Basically Mother 4)
Crash Bandicoot 2 (First game I played)
Dota 2 (The game I mainly use for playing w/ friends now, talk **** blink into trees good times)

General series I like:

-Rayman
-Little Tail Bronx
-Sparkster/Rocket Knight Adventures
-Ratchet and Clank
-Touhou
-Hyperdimension Neputunia
-Mario

[BinaryPulsar]

Okami
Nuff said

(also Grandia 3 and Splatoon and Ace Attorney and Freedom Planet and Brave Frontier and Zelda and Harvest Moon and Undertale and Killer Instinct and Osu! And Tenchu and  *goes on and on*)

[TimertheBunneh]

Pop'n Music (series)
Trickster Online

And then there's...Shin Megami Tensei: Persona 3. Oh sweet heavens, that game. DO NOT attempt if you are sensitive to feels.

[SyraxAxoJaxco]

And then there's...Shin Megami Tensei: Persona 3. Oh sweet heavens, that game. DO NOT attempt if you are sensitive to feels.

Don't forget Persona 4 too. I LOVE PERSONA SERIES.
With that, i'm also waiting for Persona 5...

[Alexinator]

It's tied between The World Ends With You and Cave Story for me.