I had to change the sentence wording to make it work, sorry.
.
... how associated things influence our preference towards things. - ok,. but formal sounding
... how associated things influence our preference on things. - much more natural sounding to me
... how associated things influence our preference about things. - ok,. natural sounding
... how associated things influence our preference in these things.- "these thing" works for me with the category included. "in these things" as in "in a grouping"