Yes. I haven't been this hooked on a game in a very long time. I wish Nintendo still made games like this. Mario & Luigi doesn't quite hit the same, though I did enjoy Dream Team quite a bit. TTYD just has so much story and each of the partners are given their own backstory as well. The partner system is the best aspect of that game, by far.
I love Super Paper Mario equally for many of the same reasons, the Pixls don't have as much backstory as the partners in TTYD but Tippi's backstory more than made up for that. And the game overall still has tons of story.