It would be nice to see the Steam Deck mentioned as a platform when checking my completion chart by platform percentage, but using "Linux" as a platform is good enough. Though I can see how it would be incovenient for people who use Linux on their main computer.

Owned both of them for a little over a year and I finally got enough time to dive into the best these systems have to offer.

VITA:

Persona 4 Golden
Killzone Mercenary
Catherine: Full Body

That's all I played and finished so far and really enjoyed all three. I'm almost finished with both Persona 3 Portable and Muramasa Rebirth, and I'm not sure what to play next. I'm thinking of either trying a visual novel for the first time (got my eyes on Utawarerumono, but the Nonary Games and Danganronpa look very interesting as well) or diving deep into yet another JRPG, Final Fantasy X or TLOC: Trails in the Sky series.

And I haven't finished any 3DS games yet, haha! But I plan to change that soon with Fire Emblem Awakening, Shin Megami Tensei 4 Apocalypse, and Metroid Samus Returns.

Both of these systems are really great. I'm very glad I managed to get both for about 100 euros each. There's so many worthwhile titles especially for those of us who grew up with PC gaming and have never owned consoles. Will definitely satisfy all my gaming needs until I build a gaming computer next year.

Maybe you guys can help me find my next adventure by taking a look at my backlog? I'm fine playing two games at the same time, one game for each console.

3DS Games:

Shin Megami Tensei IV Apocalypse
Fire Emblem Awakening and FE: Fates games
Metroid Samus Returns
Radiant Historia: Perfect Chronology
SMT: Strange Journey Redux (although I don't think I'm in the mood for a very long-combat oriented dungeon crawler right now)

PS Vita Games:

MGS 2 and 3 HD + MGS 1 on PSX - this one is tricky, I'd really like to get into the series but I'm not in the mood to play the first one due to the dated control scheme and gameplay. Is it a good idea to watch a story recap online and then jump straight into MGS 2?
Gravity Rush
Odin Sphere Leifthrasir (will probably play this one at a later time because it is very similar to Muramasa)
Velocity 2X
LOH - Trails in the Sky series
LOH - Trails of Cold Steet I & II
Final Fantasy X and X-II HD
YS VIII - Lacrimosa of Dana
Soul Sacrifice Delta
Sly Cooper 4
God of War Collection
Rayman Legends
Danganronpa games
The Nonary games
Utawarerumono games

As you can see, I'm a little bit biased towards the Vita. It has a lot of JRPGs, which is a genre I only recently managed to get into. I'm open to any recommendations outside my backlog as well, already planning to add some of the games mentioned in thread to my list, especially for the 3DS.