There is evidence that leaf mould can help newly transplanted material to re-root itself more quickly than just placing in ordinary soil, apparently its to do with bacteria within the compost?
Leaf mould can make the soil more acidic, but on the good side it can help with increasing the water holding capacity, reduce soil erosion and help with increasing the temperature of the soil itself in the early spring (dark soils warm up quicker!) plus leaf mould can help with aeration and root penetration, and can protect from frost if piled over tender herbaceous plants.
I find it useful for revamping compacted soils as it doesn't allow compaction with dry areas too much.
I would try woodland edge plants, Hellebores, Bergenias, Epimedium, ferns, Gunnera, Erythronium, bluebells, Hosta, Polygonatum and the list goes on...well they do alright in my garden- swear by the stuff I do.
I collect any type of leaf going although I find the leaves of deciduous trees better and a little bit mixed with a few grass clipping helps too- try apple and pear, maple, lime, hazel, hornbeam, cherry and any other hedge row tree too, however oak and beech take a bit longer (results in a much darker compost)and anything like London plane is a not advised- best to think of anything that tough like evergreens, best put through a chipper! or mowed over (poor mans chipper) and then put on the heap. Remember to keep the heap fairly wet as pure leaf heaps have a tendency to dry out in the middle and go like paper in the center- however if you use the bag method, remember to pierce the bottoms to let the gravy/juice out or you will get very messy indeed.