In reply to TamsinEB:
It's interesting how every type of photography is different. Having the skills and eye at one type doesn't necessarily tranfer to other types and you just have start at the beginning.
I liked the better shots in your portfolio but I would have left a lot of the less good ones out. Australian climbing photographer Glenn Robins used to say that from one roll of film (36 shots) he'd typically get one really good one and two or three other usable ones. And he was a great photographer, with lots of experience so for the rest of us its likely to be far fewer than 1 of every 36. So I'd say cut out all the second rate ones and the portfolio will immediately appear better.
Some places are inherently more photogenic and I think top roping on sandstone is far from ideal so a different location could be very helpful.
Do you shoot RAW and edit in a RAW editor? In the photos of the pinnacle (Illam Rock?) the climber in shade was under exposed. In a RAW editor this could have been corrected. If not shooting RAW then you should have exposed for the subject rather than the background.
In all photography its good to decide what the subject actually is. In climbing photos its usually either the climber, the route, or the environment in which they're climbing. Whilst you usually see all three in a shot I think its useful to have an idea of what the main thing is you are trying to capture. This can help with the thought process for composing the image.
If its the climber then you want to make sure you get their face in the picture. Because they're facing in towards the rock or up this is not too easy to do. It typically means you want to be above or level with the climber. If you can't do either then being well back, with a telephoto lens can also produce good results. Also waiting for them to look down, when moving their feet can work well. So the key is to wait for just the right moment when they turn their head the right way.
Often the face may be underexposed because the climber is facing the rock, away from the light. Using a fill flash is often impractical for climbing shots so again editing in RAW can fix this easily.
If the route or the environment is the subject its still good to get the face in. But if you don't get the face then aim for a good body position. That is on an interesting move, often where the arms and legs are clearly separated, rather than an amorphous lump.
Finally I'd say it good to label your photos, at least with the route, location and grade of a route because any climber viewing your image will always want to know those things.