Why is more music written in sharp keys than flat keys?

1. Are sharp keys more common than flat keys?
2. Why do flat keys sound different?
3. Why are some keys flat and some sharp?
4. Why are songs written in different keys?

Are sharp keys more common than flat keys?

According to The Most Popular Keys of All Music on Spotify, an analysis of their song library, sharp keys are more common than flat keys.

Why do flat keys sound different?

On some instruments, even those that are nominally tuned in equal temperament, there are real reasons why different keys might sound different : the pitches of open strings; the resonances of the instrument; imperfect tempering, and so on.

Why are some keys flat and some sharp?

Sharps indicate a raised note and the direction it wants to resolve. Flats indicate a lowered note and the direction it wants to resolve. Accidentals when written correctly, make lines easier to read.

Why are songs written in different keys?

Music for solo voice and piano is often made available in different keys to suit the voice range of different singers. You would notice if the same singer sang a song in different keys because it would lie differently within the voice range.