Technically you are collecting for the Vita.  Collecting dust :P.

I keep the cases. I'm kind of a collector (I never sold any games, and I usually try to get boxed copies of old games (see my profile picture, actually)), so they're important for me. The reason I didn't take a picture of them is that they are at my apartment and I'm currently at my parent's place.

LBP Vita was a game that I bought for 7€, and for that, it's quite alright. I'm not a big fan of the LBP games and never played them much (even though I own the first one on PS3 and the one on PSP), so I can't reall tell you how it holds up. I'd guess that if you like the PS3 one(s), you'll like this one, too, as they seem to be pretty similar. But again, I don't know a whole lot about these games.

Here are my Vita games minus the ones I've got from PS+.

Uncharted Golden Abyss
Gravity Rush
Little Big Planet Vita
Wipeout 2048
Unit 13
Tearaway
Modnation Racers
Ragnarok Odyssey
Persona 4 the Golden
Muramasa Rebirth
Ys Memories of Celceta
Ninja Gaiden Sigma 2
Mortal Kombat
Batman Arkham Origins Blackgate
Disgaea 3
Killzone Mercenary

Digital games playable only on the Vita.

Uncharted Fight For Fortune (this game is good.)
Earth Defense Force 2017

There's a user on here who has an amazing Vita collection. I forget the name, "overblown?" He has a P4G Golden as an avatar though.

Here's mine, nothing changed for Vita :(

Edit: Forgot I have Madden and FIFA digital.

Want to get: Ys and Tearaway.

Very good! That's a good 3DS collection too, I only have 2 games for it.

I don't have pictures but I have...

Physical:

Assassin's Creed 3 Liberation
Fifa Football
Everybody's Golf
Gravity Rush
Killzone Mercenary
LittleBigPlanet
Metal Gear Solid Collection
Persona 4 Golden
Soul Sacrifice
Uncharted Golden Abyss

Digital:

Escape Plan
Guacamelee
Hotline Miami
Modnation Racers Roadtrip
Motorstorm RC
Rayman Origins
Sly Cooper Thieves in Time
Sound Shapes
Spelunky
Tales from Space Mutant Blob Attacks
Tearaway
Virtua Tennis 4

Digital from PS+:

Big Sky Infinity
Chronovolt
Coconut Dodge Revitalised
Jak and Daxter Collection
Jet Set Radio
Knytt Underground
Lego Lord of The Rings
Limbo
Lumines Electronic Symphony
Mortal Kombat
Ninja Gaiden Plus
Oddworld Stranger's Wrath
Puddle
Sine Mora
Sonic Racing Transformed
Stealth Inc
Street Fighter x Tekken
Thomas Was Alone
Touch my Katamari
Unit 13
Urban Trials Freestyle
Velocity Ultra
Virtue's Last Reward
When Vikings Attack
Wipeout 2048


Of course most of the digital stuff is not on my 16GB card anymore.

Physical:

Uncharted Golden Abyss

Mortal Kombat

Soul Sacrifice

Digital:

LittleBigPlanet PSV

Rayman Origins

Motorstorm RC

Ratchet & Clank Full Frontal Assault

PS All Stars Battle Royale

PS+:

Gravity Rush

WipEout 2048

Dont have any pictures but here we go:

Physical:
Persona 4: Golden
Ys: Celceta
Killzone Mercenaries
Gravity Rush
Soul Sacrifice
Assassins Creed 3 Liberation

Edit: Forgot Ragnarok Odyssey

Digital (Including PS+):
Virtues Last Reward
Hotline Miami

Still need to buy more games I just have not yet got, such as Tearaway, Dragons Crown, and Muramasa

Free games and really crappy games are excluded, the rest looks like this (of course more than half of them are from ps+):

• Motorstorm RC
• Uncharted Golden Abyss
• Gravity Rush
• Wipeout 2048
• Ninja Gaiden Plus
• Sonic All-Stars Racing Transformed
• Assassin's Creed Liberation
• Metal Gear Solid HD Collection
• Blazblue: Continuum Shift Extend
• Disgaea 3: Absence of Detention
• Littlebigplanet Vita
• Germinator
• Zombie Tycoon 2
• Machinarium
• Rayman Origins 
• Unit 13
• Strangers Wrath HD
• Soul Sacrifice
• Knytt Underground
• Jacob Jones
• Limbo
• Sine Mora 
• Pure Chess
• Spelunky
• Guacamelee!
• Hotline Miami
•  Retro City Rampage
• Flower
• Men's Room Mayhem 
• StarDrone Extreme
• Dragon's Fantasy Book I
• Sound Shapes
• Zero Escaoe: Virtue's Last Reward
• When Vikings Attack
• Dokuro
• Virtua Tennis 4
• Tales From Space: Mutant Blobs Attack
• Plants vs Zombies

I don't have a vita but thanks to ps + and cross buy I have about 5 or 6 games for it. Maybe next year I will finally get one. But I may just get a ps4 instead.