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This is still half-baked, but I was hoping to get feedback and ideas here. :)

Rory Story Cubes idea inspired by 'The Sims'

Anyone who has played The Sims will be familiar with what I'm talking about. However, if you are not and want a more in-depth look, you should read this wiki overview: http://sims.wikia.com/wiki/Interest

The basic idea is that when two Sims chat their relationship gauge increases or decreases based on whether their interests match during conversation. The thing that made me think of the story cubes is that conversations in The Sims use iconography representing the interest being talked about. 

How it may apply to the story cubes during solo RPG'ing

The basic idea is to get matching iconography between PC and NPC in order to increase relationship status. This would represent conversations going well and the PC and NPC building increasing rapport because of similar interests, or whatever the context suggests. Mismatches would decrease this status for whatever reason (they find you boring, annoying, etc). The icons themselves would also suggest the gist of the interaction in a quick fashion.

Some half-baked ideas for an implementation 

Player would handpick certain icons to represent what he is saying to the NPC (player would note them and put the cubes back in the pool). NPC's interests would be determined by randomly assigning a number of cubes to them (how would this number be determined? Based on an NPC's stat, like Wisdom/Intelligence, for example). These cubes represent their interests that could potentially come up in a conversation. NPC cubes would be rolled and then the player would try to find matches between these and the icons the player chose.

Exact matches in iconography - less probable but would provide bigger bonuses to relationship gauge.

Partial matches (i.e. icons that share some features)- more probable, but smaller bonuses. 

Relationship gauges would have different thresholds indicating the status: So on a scale of 1-100, 1-10 could indicate the NPC can't stand you, while 90-100 could indicate you're one of their favorite persons. This could also color how you imagine your other interactions with them.  

Those are all details that would need to be worked out into a coherent system. 

One could always just rely on a reaction system, like D&D, but I feel like a mini game of this sort could add to the enjoyment of solo RPGing. 

https://s-media-cache-ak0.pinimg.com/736x/60/46/3b/60463b3ffba498e54b2fa0c505c1d8d2.jpg