One of my personal favorite composers. The epitome of Romanticism, perhaps, and I love him for it. The piano works in particular strike a chord with me:
Carnaval, Fantasiestücke, Davidsbündlertänze, the Fantasie, Kreisleriana, Symphonic Etudes, Waldszenen, Kinderszenen, the Novelettes, Gesänge der Frühe, Concert sans orchestre, the F# minor piano sonata, the G minor piano sonata, etc. etc. etc.
What wonderful music this madman left the world! I haven't even mentioned his orchestral, chamber, and vocal music -- all of which is superb. Schumann is a master of contrast and emotional extremes. What are some of your favorites?