Research interest - the evolution of TE activity

Given the outstanding importance of transposable elements for genome evolution, adaptation to novel environments and human diseases, our knowledge about the evolution of TE dynamics is surprisingly limited. Why are some species, like Arabidopsis thaliana, almost free of transposons while for other species, like Paris japonica, transposons constitute bulk of the genome? Why are some species, like humans, mostly containing RNA transposons while other's like Caenorhabditis are mostly containing DNA transposons?
It is my aim to shed light on the forces that drive the evolution of TE content and composition in different species. I approach these questions both at a macroevolutionary level, comparing the TE content in related species, and at a microevolutionary level, investigating TE activity in experimentally evolving populations.