I am not exactly thin but I have managed to sort out what works for me and what doesn't.
I find that stiff fabrics can be hard to pull off. Flowy (not puffy though) and slightly elasticated fabrics flatter the figure and give a streamlined effect. Avoid drawing attention to problem areas by having limiting the amount of work done in that area.
I personally think any colours will work, the fabric is the key!
any recommendations ? i mean brand? do they fit any person and size easily?