Working also with NURBS and T-Splines concepts such as N-Gons is very familiar to me when it comes to locally subdivide the mes for detailing. Blendercookie made this timelapsed movie demonstrating the workflow BMesh will bring to you, which eliminates many old school mesh clean up tasks when subdividing faces or edges by hand.
I spent a couple hours the other day testing out the development version of BMesh for Blender by modeling a human head. There are a few quirks here and there but overall it's wonderful! The NGon support for non-destructive mesh modeling is fantastic.
The model is far from finished but it was a good way to test BMesh.
Music by Enzo Carlino.