I compared output from the "canned" Epson ICC profile for Ultra Premium Lustre Photo Paper using PS to manage the output versus letting the printer manage output. The latter has more snap.
Admittedly with some trepidation about wading into these boiling waters, but after reading all the posts in this thread I wonder if this might explain your affinity for printer-managed output:
I often print on Epson Premium Lustre ("Luster," in my neck of the woods). I've never experimented with letting the printer manage the colors. I've always been completely satisfied with the results when I soft-proof, using the Epson-supplied profile with Lightroom — I assume the results with Photoshop would be similar — and, frankly, I wouldn't want to abandon the control I get from soft-proofing.
But it occurs to me that the adjustment I need to make most frequently with that paper is to crank up the "Clarity" a bit. The second-most frequent adjustment is to increase the "Vibrance" slightly. Of course,
sometimes some colors are out-of-gamut, but I suspect usually not by much, and usually changing the rendering intent takes care of the problem without further fiddling with the color controls. (Not always, of course.)
So I'm wondering whether the printer-managed-color setting automagically makes some of the changes to Clarity and Vibrance I'm accustomed to dialing-in manually — analogous to the way in-camera processing creates punched-up JPEGs. If it's primarily mid-range contrast and saturation that you like, maybe printer-managed color is the equivalent of an output preset.