wow, thanks for all the quick replies, I'll look into your suggestions. Narofx maybe I used the term portrait wrongly - I mean at least head to waist, but sometimes capturing more of their body - still, emphasis on facial expression rather than the background/setting. And outdoor shots rather than indoor. Octarine, I know there is plenty more I can learn with my existing kit, but thought it would be fun to experiment with something different too. Am I wrong that changing to a fast speed decreases depth of field because of the change in aperture? I have read the basics and done a mini-course, not professing to be a gun photographer but just someone who wants to explore photography a bit more..... Thanks for the link pinholecam, that should be helpful.
Thanks again for all the advice!