The portuguese guy is a good and sensible performer.
The Azerbaijan one is a tad bizarre bat a good performer.
The sax guy from Moldova truly is epic.
The UK girl from X Factor is good but she has the same problem of Italy's girl of the last year, who also was from X Factor; they're generic good crooners.
As you said Gabbani's Occidentali's Karma is infectious, but also upon listening more closely to the lyrics you can discover that it's a smart and ironic song, there are also a couple of nods to famous works of science literature among the new age cultural references. I'm glad for once it's not a stupid song to be on top of the national charts. Also he's proven to be a good showman, the Gorilla idea was very smart.