In case of a geometry (e.g. depressions) where one of the faces has much bigger angle than the others it is worth to consider using a chordal fillet.
When a regular Edge Fillet or Shape Fillet is created, a constant radius value is propagated - Fig.1. A Chordal Fillet creates a geometry with a constant chord length - Fig.2. In first case, the surface created between the base surface and the depression becomes very small, because of the large angle. Therefore using chordal fillet might give more aesthetic result in some cases.
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| Fig.1 |
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| Fig.2 |