1. Lieder Maestro: Franz Schubert is renowned as one of the greatest composers of lieder, or German art songs. His song cycles, such as "Die schöne Müllerin" and "Winterreise," set the standard for the genre and remain cornerstones of the vocal repertoire.

2. Unprecedented Productivity: Despite living only 31 years, Schubert composed an astonishing amount of music. His prolific output includes over 600 secular vocal works, numerous chamber music pieces, symphonies, and operas, showcasing his exceptional creativity and productivity.

3. Symphonic Innovator: Schubert’s symphonic works, particularly his "Unfinished Symphony" and "Great Symphony" (Symphony No. 9), are celebrated for their emotional depth and innovative orchestration. His symphonies bridge the Classical and Romantic periods, influencing composers such as Brahms and Bruckner.

4. Musical Maverick: Schubert’s music often defied conventions of his time, incorporating unexpected harmonic shifts, expressive modulations, and poignant melodies. Despite facing some critical neglect during his lifetime, his compositions were rediscovered and championed by later generations of musicians and composers.

5. Bohemian Circle: Schubert was a central figure in Vienna's artistic and intellectual circles, known as the Schubertiades. These gatherings brought together musicians, poets, and thinkers to celebrate Schubert's music in an intimate and convivial atmosphere, reflecting the composer's popularity and influence during his lifetime.