I've tried to embrace tinsel and flashing lights but I just can't do it 
Our tree is kind of co-ordinated and we have white lights, but is still just a load of random decorations slung at it. They're just all similar colours 
We go shopping every year and the kids choose a new decoration each, there are a load of handmade ones the kids have made at school over the years, albeit slightly tatty now, we usually spend a Sunday afternoon watching Christmas movies while making paper chains and stringing popcorn to wrap round it instead of tinsel, there's candy canes, we made a whole load of felt robins, reindeers and stockings one year.
We used to have a nice set of matching and co-ordinating baubles, but as the years have gone by and we've bought more and more of the ornament type stuff, we've chucked them out.
I made the kids long strung advent calendars one year and they get bought out every year. A couple of years ago I was watching a Christmas film and loved this garland they had in it made from red and white rags, so I made one and that gets brought out every year (a bit like this, but long and goes all the way round the living room)
It's very Christmassy, but I can't do anything that flashes