Any suggestions for new games?

There are a lot! heres what I recommend

Animal Crossing New Leaf

Professor Layton And The Miracle Mask

Warioware Gold

Rhythm Heaven

Rusty's Real Deal Baseball

Disney Magical World

Pilotwings Resort

Yoshi's New Island

Poochy & Yoshi's Wooly World

If you like turn-based games I can recommend Shin Megami Tensei IV

animal crossing new leaf

tomodachi life

any Pokemon game (x/y, sun/moon, omega ruby/alpha sapphire, black/white etc)

picross 3d

Sanrio picross

nintendogs

style savvy 2

wario ware 
cooking mama

kingdom hearts dream drop distnece 

f1 2011 my goat. keeps my entertained for hours

I am fond of the Zelda Games (Ocarina, Majoras Mask) 

With KORG M01D you can create music tracks, it also comes with an oscilloscope

Also try out Automaton Lung

And remember, you can play DS games as well:

Emergency Rooms: Real Life Rescue is pretty fun, here you have to examine patients in an emergency, apply life support, all with the stylus.

And Wario Ware Touched is also fun to play with catchy music

Mario Kart DS has a ROM HAck: CGTP Nitro

And Sims 3 is on DS as well!

Kid Icarus uprising is super fun

You can also emulate ps1 games on the 3DS, though they're not the best quality and its not guaranteed they all the games work, its how I played and fell in love with FFVII with no Playstation 

Pokemon Mystery Dungeon: Explorers of Sky is an AMAZING game if you want something with a good plot and a lot of story!