I love your shot ! There is something attractive for the eye but i don't know what... Maybe the contrast between the blue sky and the orange atmosphere of the compartment... the eye must "run" on the picture to see all the details, because the man is on the right however the sky is on the left ! It's very interesting ! I put it into my favorites !
Thank you very much! I think it's perhaps a combination of the things you said, also there are some very clear lines in the shot for the eye, the window and the table almost creates a geometric figure. (unintentional of course)