Wow guys - thank you all so much. That's such a positive first experience of using this forum, I really appreciate you taking the time to look at my portfolio and provide such customised advice.
Pretty much all makes complete sense, and I will go through and address all the points around key wording & repeat images, B&W, cropping etc...Thanks!
I have a couple of questions for Doc / Kumar and Geoff / GS-Images though if you can advise further:
Doc - you said add "copyspace" to my keywords - do you mean literally add that word to the keywords section of every photo? What does that do?
Geoff; there's mixture of JPG and RAW, as some of my older images were taken before I would do any post-processing. I now shoot everything in RAW and post-process in lightroom. However, if your observation applies to the more recent photos in my collection, I'd really like a bit more detail on what I could do to process them better? I use the histogram to check for white-outs etc, and generally just adjust by eye. I use an iMac - not sure if / how to calibrate the monitor?
Thanks again everyone