Traded my D90 to an EP-3 and now starting to ask why I did it.

Say what?  10 2.8 DX Fisheye, Nikon 35 1.8 DX, 40 2.8 DX Macro, 85 3.5 DX Macro, Sigma 30 1.4, Tokina 35 2.8 Macro, off the top of my head. There are more like the APS-C Fishes from Samyang.

Plus all FF Nikkors work perfectly on any DX body.

AND there are countless high quality zooms from UWA, f2.8 normal zooms, to telephotos zooms and primes.

And a four lens kit like the Tokina 11-16 2.8, 35 1.8G, Sigma 17-50 2.8 or Nikon 17-55 2.8, and a FF 70-200 2.8 or f4 by Nikon, Sigma, or Tamron (depending on your budget) is a difficult to match and extremely expensive to put together in m43.