Hi, my name is Alex I'm an amateur photographer. I work with a canon digital camera and in photoshop. The trouble is I've hit a wall and I'm not sure how to improve my photographs and if it is even worth doing so.

Here I have got 6 which I've uploaded to photobucket- all of which have been rejected by istock. The reason behind it probably will be quite obvious to a lot of you so what I'm looking for is some advice.

My photos- http://s844.photobucket.com/albums/ab2/bosharpe/stock/

I know they bug me but specifically what I haven't figured yet. I've played around with contrast, brightness etc..and learnt some techniques in the process but nothing extremely useful.

Thank you very much in advance.

Alex