I enjoy Miitopia very much! It reminds me of an old timey rpg but with good graphics, fun dialogue, a very simplified and relaxed play style. Games within the game are enjoyable, sound effects and music feels whimsical without getting on my nerves (yet), you can deeply customize characters if you wish, leave them generic, or even evolve characters as you get into the game, change their personalities which changes fighting style and personal interactions in the group.
And you get a friggin horse! How cool is that? You can customize your horse to your heart's content. Plus the horse helps you in battle!
The characters are a hoot, and nothing so far has been difficult to accomplish, which keeps my interest, if a boss or quest is too frustrating I tend to not want to continue, I like the ease in which this game flows, it's very Zen, I would recommend this game to anyone looking for a relaxed entertaining RPG. You can even set your Mii character to auto fight, but that might take all the fun away.
Try out the free demo, it gives a great introduction to the game to see if it's your style. And you get the horse towards the end of the demo.
You can even keep your progress if you decide to buy the full game, or you can keep playing the demo, you just can't progress further in the storyline, but you can continue to increase gold and other stats until you decide whether to buy or not.