I was choosing between J, H, G and D.
I almost went for D till I realized that I'd never have D as a background music, it's too hectic for my personal taste as background.
G seemed like a very good choice until one of my friends who makes music, pointed out to me that the submitter of G may have used a sample pack from a website without even actually changing anything from it. He showed me a demo of the sample and it sounded very close to G. If that's true, then I am not voting for G.
My only real choice was now between J and H. At the very last moment, I voted for H. The way the chords in H progress is really beautiful, it's almost neutral yet uplifting. J is beautiful too, but I personally would have H in my background music.
That said, all the submissions here are awesome and therefore, I believe that Opera GX team should let us have all these 10 songs once the competition is over.