Hey man. I noticed most of your model's screenshot has a lot of blank spaces. Im not trying to change the way you work, Im just trying to help you attract people to your models. Like this one, if you cropped all the gray spaces, the arrow would appear larger.
I myself as a part mapper, I am very lazy to click every single model I searched just to take a closer look. I'd only click the model if the screenshot is very eye pleasing to me. Im pretty sure some of the mappers have the attitude like me too, so just giving you a clue of mappers thought.
Another good example would be your HaradrimWatchTower. You know from current screenshot, it looks like 3 pile of wood attached to an inverted umbrella. Very weird. But then I opened the model in Magos, and I found that the model and the screenshot are like two seperate models, something like a low poly version (screenshot) and high poly one (actual model).
Errr... so yeah... Get my point? Pardon my poor english.