Thought I'd get some discussion going.  Dangerous stuff.

I'll bring some suggestions for each year, but feel free to post which year was your favourite and list your favourite games from that year!

2012 notable software

Assassin's Creed 3: Liberation

Gravity Rush

Hot Shots Golf: World Invitational

LittleBigPlanet PS Vita

Persona 4: Golden

Need for Speed: Most Wanted

PlayStation All-Stars Battle Royale

Uncharted Golden Abyss

Unit 13

WipEout 2048

2013 notable software

Atelier Totori Plus

Batman Arkham Origins Blackgate

Dragon's Crown

Hotline Miami

Killzone Mercenary

Soul Sacrifice

Spelunky

Tearaway

The Walking Dead: Season One

Ys: Memories of Celceta

2014 notable software

Borderlands 2

DanganRonpa: Trigger Happy Havoc

Final Fantasy X/X2 HD Remaster

Freedom Wars

Hatsune Miku Project Diva f

Hyperdimension Neptunia Re;birth 1

Minecraft

Sword Art Online: Hollow Fragment

Tales of Hearts R

Velocity 2x

2015 notable software

Bastion

Grim Fandango Remastered

Helldivers

J-Stars Victory Vs.

Legend of Heroes: Trails in the Cold Steel

Oreshika: Tainted Bloodlines

Persona 4: Dancing All Night

Resident Evil Revelations 2

Steins;gate

Toukiden Kiwami

And as a brucey bonus, here's 10 things to look forward to, coming to the west in 2016 (that we know about... there's definitely going to be more)

Assassin's Creed Chronicles

Attack on Titan

Banner Saga

Day of the Tentacle Remastered

Digimon Story Cyber Sleuth

Drift Stage

One Piece Burning Blood

SId Meier's Civilization Revolution 2 Plus

Stranger of Sword City

World of Final Fantasy

In before:

"You missed xyz game from xyz year!" - Yes, I know, it's not an exhaustive list, just some pointers for more notable titles of the year.

"None" or "2014" - At least justify an opinion to get some discussion going

"Vita has no gaemz" - Keep that shit out of here please

Thanks!

For me, 2014.

I liked bits of 2012, but it was too "look western AAA!" and lacked a lot of quality. Gravity Rush; LBP; SSDD & LBP were good but the rest I could take or leave. Lacking in Japanese games.

2013 was a decent year - it was the last of the western AAA (Killzone/Tearaway) and was the start of the indie push with some great titles (Hotline Miami/Flower/Proteus). However, I felt it was kinda lacking Japanese titles again, outside of Dragon's Crown, Atelier & EDF.

2015 has been a bit of a dud for me. Steins;gate/Oreshika/Lost Dimension were great, and it's recovered in the final months with Bastion/LoH. But there were long runs where it was quiet and some games were let-downs for me, like DanganRonpa & Sword Art Online.

But 2014 was fab. Kicked off with a bang in Europe getting the localizations from the end of the year before (Ys/Sorcery Saga) straight into NISA's two surprises of the year (DanganRonpa/Demon Gaze), both of which I loved and didn't expect to. Got some great indies during that time like TxK and Fez. Then during the summer we had the HD Collection ports (GoW/Sly/Ratchet) and Borderlands for the last real bit of AAA on the console then tailing off into autumn/winter the localizations kicked in again - Sword Art Online/Tales/Akiba's Trip/DanganRonpa 2/Neptunia 1 etc.

I loved so many games in 2014. Unfortunately I do think it's the console's peak year and although I'm excited for stuff in 2016, I don't think it's ever again going to have the broad range of titles it had in 2014.

2012 followed by 2013

Goddamn Totori always overshadowing Rorona. I'll never forgive her. I'll create an explosion on her face on purpose
Heh they're all too good, it's tough. Each had its own good points. 2012 and 2013 debuted great new IPs and had a great LBP entry. Then 2014 and 2015 were filled with Japanese goodness
You know I gotta give it to 2014 because of Rorona though. Plus, Neptune's western debut on Vita..

I came into this thread expecting to put 2012 duh!... but then looking at even just the small samples you've put, I actually can't pin down a specific year. Every year has actually been pretty awesome so far.

I have so many Vita games....About 150. Maybe more. Around 30 of those are from PS+. It would be a pain to try to first group games by year, and then evaluate my collection on year by year basis. And obviously, I have not played them all. Half of them if I'm lucky. So, "can't make up my mind". I have launch games still sealed in the plastic wrap.

2012 is my favourite since that's the year Persona 4 Golden came out, but really every year was awesome so far and 2016 looks like it will be as well.

2013 was the year for me. We got P4G (europe), Tearaway and Killzone, along with Soul Sacrifice.
2016 is looking more promising to me, since i'm planning to get World of FF, Dragon Quest Heroes 2 and Digimon.