I took a break from DSLR for a long time for all the reasons we love mirrorless: light, discreet, cheap, etc.
But I shot a D3x last week and boy, what a revelation! Didn't have to worry about battery life, about slow focus, about small EVF, about buffer, about anything. just took the camera and shot. And the results came out as what I envisioned.
Yes, my shoulder is still sore, but I'm seriously thinking about getting back to DSLR again.