I’m a big fan of Baron Fig’s Limited Edition Confidants (my wife goes through notebooks so fast that she tends to always have used the most recent Limited Edition by the time the next one comes out), and this one looks especially fun and whimsical.
From the product page:
This horse has no head.
That’s right. It’s up to you to give it one. Unfinish is a notebook filled with odd, unfinished pictures that invite you to finish, add, convolute, torment, tickle —and everything in between.