slim-tailedness or platykurticity
The state of being bland : dullness
Lack of bouquet and freshness of a wine, through too much aeration or infection with film yeasts
The state of being flat
The state of being two-dimensional; planar : planarity
Mattness, the quality of a painted surface which scatters or absorbs the light falling on it, so as to be substantially free from gloss or sheen
Joyous elation, joyfulness, joyousness.