The only part of your graph that worries me is the last 17k of losing play at 100NL. I think you know the answer already b/c you described it in your post, you're playing a more conservative style of poker and you're missing value as a result. Your LP stats are not nearly as aggro as they were in December and you're not playing as aggressively post-flop. Start utilizing position more, pushing people around, I think your results will probably improve quickly. Post some difficult hands too. GL.