fantasy life is great, I love monster hunter stories, etrian odyssey, I **** with monster high new ghoul in school (I love making monster girls jgkhhgf), I enjoy any story of seasons games, and fire emblem is pretty fun too
Metroid: Samus Returns. Damn I'm really disappointed that not a single person I've seen on this site(other than Stalfos) is a big fan of the Metroid series! Seems like everyone else here is a complete Pokemon nut or Fire Emblem fan or whatever. It makes me sad..
I guess Story of Seasons: Trio of Towns! I put a stupid amount of time into my first file only, and recently I started another file to put even more time into. Definitely one of my favorite Bokujou Monogatari games ever.
Not including pokemon, maybe either Rune Factory 4, Project Mirai, or the Ace Attorney original trilogy? (Even though they didnt originate on the 3ds it was still my first introduction to the series!)
Pokemon Sun and Ultra Sun. Pokemon Sun was my first pokemon game and I got hooked.
I'm now trying to go back and play the older games. Started Pokemon X/Y and enjoying it.
Another favorite is all the Professor Layton games. Enjoyed playing and replaying them again.
Either Nintendogs + cats, Pokemon Y or Super Mario 3DS Land. Out of the three I listed,
I would say Pokemon Y, as I spent a lot of time into this game back then when it came
out and later on. I remember how much time I just spent on the Wondertrade and GTS
only. Really enjoyed playing it and it is in fact one of my favorite games for the 3DS.
Rune Factory 4. I spent 2 years straight playing that game and that game only. Loved every second!
Also REALLY excited they are porting it to Switch! I thought the series was very much dead, so the announcement of a port AND a sequel has me very hyped!!
UPDATED
Monster Hunter 4 ultimate
Tomodachi Life the game is so goofy xD
Tank Troopers
Super Smash Bros.
Monster Hunter 3 ultimate
Monster Hunter Generations
and yes Fire emblems games are still my favorite. So anyways those games I just putted down on fav list are not new, they were games I played long ago and now I like them again.
And here are games that use to be my fav long ago
Ocarina of Time
A Link Between Worlds
Pokemon Moon
Mario Kart 7
Nintendo Dogs+Cats
Why you make me make these hard decisions. Anyway... um...
I guess here:
Miitopia
Virtue's Last Reward
Tomodachi Life
ACNL
Rune Factory 4
Etrian Oddysey Series
Xenoblade Chronicles 3D
Smash 3DS
Layton Miracle Mask
M&L:BIS
Heck, I love the majority of the ds and 3ds library. I even have about 30 hours in the original Style Savvy! I can barely choose...
I honestly can?t pick one favorite, but I looked at my play time the other day and was shocked to see Fantasy Life as the number 3 all time play ranking. I knew AC was 1 and I knew Kid Icarus was 2, but I thought Zelda OoT3D would be 3rd. Turns out I sunk 5 more hours into Fantasy Life.