I just wrote
There are two strange aspects of this situation.
Then I decided that
There are two strange aspects to this situation.
sounded better, but I don't know why. There are certainly many situations where "aspects of" sounds more natural than "aspects to". For example, it sounds more natural to me to say
I haven't thought through all the subtle aspects of this question.
I haven't thought through all the subtle aspects to this question.
But I can't quite put my finger on a precise rule for when to use which one. Is there one?