I know one of the major complaints with the design of Skyrim is the puzzles and the simplicity they have usually the key being in front of or above the pillars. I give you "Of Fjori and Holgeir" to consider. If you don't know what I speak of then there is more the universe has to offer you, adventure on Dude!
I'll say what I usually say. No puzzles are better than easy puzzles.
When the puzzles are all easy, with no challenge or real thought required, it becomes a case of simply going through the motions. And that is never fun.
At least it was unique and you had to think of the answer. I have also found two more that where riddles I had to figure out, not overly hard but an attempt at uniqueness that fit the lore.