I know how you feel :] Same thing happened to me with one of my photos - forty or so favourites and I didn't even like the picture. xD I hadn't even planned to post it initially, and hadn't for months. Sometimes its just the luck of the draw. :]
As for this photo, as compared to the others the reason I think it might've succeeded more is there's a stronger point for the eye to go. A lot of the lines are running together towards that sun, and that place where the eye goes is a very strong center of focus with that bright and colourful..ness. ^.^ On top of that, I must say the title was very good for this... and that can actually have an impact too, giving that image to the eye to compare it to. The other couple of photos are gorgeous but I think people are just more attracted to an explosion light and colour.
You are really very talented with landscapes, though. ^.^ I don't usually fave landscapes.. but you got it!
Hah, anyway, sorry about the novel. :] Point is, good work! Take care. :]