What have we learned (recently) from hard probes in PHENIX?

We report recent results from the PHENIX experiment at RHIC, touching on both full-energy, symmetric collisions of large nuclei (Au+Au), the traditional arena for presumptive QGP creation; and also on the newer regime of smaller and asymmetric systems (Cu+Cu, Cu+Au, d+Au). We see a number of results that may complicate or challenge the standard picture of QGP formation and interaction. In particular, a wealth of recent d+Au results are suggestive of dense medium formation in very small systems.