Relatable. Although I don't immediately throw them in the trash, I've made a system that is very rewarding for 'grower' songs. There is a lot of music that starts working only after a couple of listens, because you can't appreciate every detail at once. But, I've been doing this for many years so there are songs that I immediately can identify as non-contenders for my personal list.
As for countries with diversity, New Zealand is really awesome and we have @Wanderer to thank for that. Even if something doesn't score points, they've never sent a song that was bad. Netherlands, Portugal, Brazil are some of my favourites as well. Ireland, Australia and Norway most often picks something that I enjoy. Croatia and Slovenia also became consistent contenders in my rankings. I was throwing all of my points towards Italy in the first four contests, but then they changed up their style of picks quite drastically, though they were close top my top 12 this year.