the main page is selected by the owner and no one knows what he looks for. you seem to have a lot of waterfalls. when i upload i try to send a sampling instead of lots of them. because you don't want to tire of them.
to stand out you need images that go above and beyond. having lots of flower shots with lots of background won't do that. flowers are hard that way - everyone has flowers.
your night shots are nice, i would do more of those. but you have to advertise yourself. if your uploading and waiting, you'll be waiting forever. you have to tell people your here. you need a lot more keywords as well. interestingly enough the work that you first sent up has more eye catching appeal than the later stuff. try more of those things. in any case it takes time and energy to be seen. everyone thinks they want to be on the front page - but it won't help you sell better. and not many go on that page they log in from the side. upload lots more stuff, join groups. follow people besides yourself, and that's it.
---Mike Savad