4 Unrelated String Quartets

Hello Young Composers, 

I have finished a project of 4 string quartets, with the goal of getting 4 distinct textures and vibes, 2 slow and 2 fast.

1. Is a broad but brisk quartal and quintal harmonic piece. For nearly the whole piece, it avoids thirds and 6ths, and uses many 4ths, 5ths, and 9ths.
2. is the slowest of the four, and uses double stops for most of the piece, creating a thicker texture.
3. is the fastest of the four, with an emphasis on syncopation and skedaddling melodies. 
4. is best described as fight between quartal and triatic harmony 

Hopefully you enjoy the varied of textures I'm offering. As always I am very open to feedback and criticism, because how else will I get better?