I really can't think of any romances in the Piano literature, there are ones by Schuamnn and Brahms but I don't particularly like them. Maybe I will just post my favourite Bagatelle here:
The op.126 set of Bagatelles is one of my favourite of Beethoven. The pieces are squeezed between the giants of the Ninth and the Late Quartets, but they are very special. I think Beethoven attained purity here, and that purity and honesty will be continued to be displayed in his late quartets, particularly the slow movements.
I freakingly love this Bagatelle. It's simple but so moving. Anderszewksi plays so well here to capture that purity, and the tempo is slower than many of the other recordings. I love his Diabelli Variations too!
Henry