Any christmas themed merchandise, which definitely includes Disney baubles & other Disney tat.
Likewise christmas winne the pooh, Dr suess or whatever.
Cold white & blue christmas lights. Modern coloured christmas lights - bring back the vintage lights with soft reds,pinks, orange, yellow, blue, purple & green
Outdoor laser lights. Inflatables. Tree colour pallettes which are too flat & dull - just ends up looking a bit sad.
Elf on a shelf - creepy f*ckers.
Christmas cushions, loo paper, bedding, pjs etc.
Christmas jumpers.
Baubles with the year on them or 'The Smith Family' etc
Travel souvenir baubles.
I like a bit of kitsch but in moderation - so the odd dancing christmas tree or naff sparkly something is charming. Have a nostalgic soft spot for foil ceiling decorations & tinsel.
I prefer decorations that have been collected over the years and continue a country's cultural tradition - so I like the odd gonk or nutcracker but less is more.