It would already satisfy my need for "thinking" if quests had no black/white solutions to them. If I had to think about what I want to do, basically
That said I do not know how to make good puzzles... but I can tell when a puzzle is bad. Not very helpful...
If you make me care about the characters in my party or companions or specific npcs, you would have already found someone who loves your module no matter it's puzzle design.
The less I care about the characters, the more I look at the design of quests and situations. It's in my blood as modder or something....
