Dual category lists??

So i was thinking, and what about the possiblity of instead of one, you could actually choose more categorys that your list fits in to, of course this would still be limited to two only.

This would make putting items from two different categorys in the same list much easier than it is now, and it would be available to a bigger "audience" to enjoy, and who knows maybe it would open space for different kinds of lists to be made.

of course this is just an idea, wether this is actually practical or even exploitable is open for discussion and its the reason why created this topic.

;)