I've played every Picross clone from here to Puzzler world and I don't have a 3DS. Loved Hex/Crosscells. Recently I tried Imprint-X (pic 2) because I thought the art was neat but it's somewhere between Please Don't Touch Anything, The Room and something requiring a lot of reflex-based clicks. It's not really putting me in that zen state, in other words.
What's your favourite puzzler, anon?