For the cases where a question would be too condescending, or things that are mostly a matter of taste, I phrase them like you did: using the words 'I think'. S

For the cases where a question would be too condescending, or things that are mostly a matter of taste, I phrase them like you did: using the words 'I think'. Still leaves open the possibility that I missed something obvious, or that it's ok to disagree with me.