Creating your own
I love creating my own power ups, bad guys and quests but when it comes to choosing which strength they affect the most, a lot of the time I have overlaps.
It'd be great if you worked in the option of being able to assign more than one strength to personal creations.
For example, I have a bad guy, and a power up to tackle him, that affects both my mental and emotional resilience. I'm choosing mental resilience at the moment, but I know that when this baddie gets to me, he rips my heart out, and the power-up to tackle him is a massive, supportive hug.
So. Being able to have dual resilience options would be an awesome addition to creating your own.