Clay models

My tutor Dan suggested that I did a clay modelling exercise to see if I can get past this point that I am currently struggling with... the final layout and design. I know that I want an open-plan, organic-feel and for the overall design to appear as light and not just as heavy large spaces. I am currently struggling with this stage as I can not decide which form to take for the design. The following images were some of the small layouts that I created with clay:

The 'green' building is an idea I had for a greenhouse that would back up onto the cliff face. In hindsight I don't think this would work too well and the cliff would probably overshadow the small (in comparison) height of the building. It could be a good idea to move the building away from the cliff face so that it does not become overpowered. 

 
This exercise was somewhat helpful in looking at the spaces in different layouts but I really need to start drawing out the overall design sequence of the building before I do any more modelling