  We examine some debated points in current discussions about rotating stars:
the shape, the gravity darkening, the critical velocities, the mass loss rates,
the hydrodynamical instabilities, the internal mixing and N--enrichments. The
study of rotational mixing requires high quality data and careful analysis.
From recent studies where such conditions are fulfilled, rotational mixing is
well confirmed. Magnetic coupling with stellar winds may produce an apparent
contradiction, i.e. stars with a low rotation and a high N--enrichment. We
point out that it rather confirms the large role of shears in differentially
rotating stars for the transport processes. New models of interacting binaries
also show how shears and mixing may be enhanced in close binaries which are
either spun up or down by tidal interactions.
