Anything you want to be on it?

[Leafy]

I would like more advanced relationships between sims (this appears to be happening), as well as a more complex turn-ons/turn-offs sytem

In TS2, there is a sort of 'mutual' chemistry... Even if your sim is turned on by the other, if the other sim isn't/is turned off, their chemistry isn't as high/isn't even there, etc. It would be cool to see a sort of one-sided attraction (the random, creepy stalker, always idolizing the beautiful cheerleader, who hates him).

Also, it would be cool maybe to have different 'levels' of relationships.
There could be just the general level, a 'platonic' level, and you gain here by chatting, playing red hands, etc.
Then possibly a 'romantic' level. Added by flirting/other romantic interractions, but also by generally being turned on/off by the other person.