Guild Wars 2

I think it would be a nice addition to color code the heart tasks.
Example:
Trivial task could be highlighted as grey, such as feeding animals, cleaning stuff, etc.
Challenging tasks could be orange, such as fighting mobs, etc.

It would just be faster to read which tasks you want to do in the upper right corner.

Well most hearts have both of these as an option rather than one or the other. For instance you can feed the cows or fight the wurms to complete the same task. As such colour coding would not work that well.