I am in a 'house divided' and our compromise has always to decorate by season.......
For fall we do lots of 'harvest' stuff......our gate has scarecrows representing each family member (so do our gardens!), garlands of fall leaves and acorns, bales of hay artfully stacked along with an assortment of pumpkins and gourds. Theme is carried in our home decorating too!
Our drive way is outlined with gourds that have been carved in artful scroll work and act as covers to the solar lights, creating a sweet glowing path at night...... We also have some carved gourds and small pumpkins hanging in the trees around our back porch area that creates a very pleasant theme for entertaining when you add battery lighted 'candles'.
For winter we go with a snow/winterwonderland theme.
Spring... flowers and other 'growing' stuff
Summer.... flip flops, sand and water activities.
I have only had one comment about someone feeling stumbled..... I pointed out to Sister SuperSelfRighteous after her very loud rant/condemnation that her insistance that we do as she would do was just as equally stumbling! I apologized to her and her Elder-Brother-in-law insisted she apologize back.
I love Leavingwt's suggestion too, but don't limit yourselves with 'holiday' wear.....