In the Portal games, what personality traits do the cores represent?

In the first Portal game, it's made quite obvious what most of the cores represent. The silent, purple one is morality, the orange one that asks constant pointless questions is curiosity and the red, growly one is anger/emotion. However, it's never made clear what the core that spouts out a cake recipe or any of the cores from the second Portal other than Wheatley are supposed to regulate on GLaDOS.

I just want to know what emotions/personality traits the cake core, the space core, Rick and the fact core are supposed to be for GLaDOS.