Answer:
I can be winding and I can be straight. I can be smooth and I can be rough. Sometimes both. I start out black but fade to brown. My favorite colors are yellow and white and I love stripes and dashed lines.
I am commonly abbreviated to H
I am a ship that can be made to ride the greatest waves. I am not built by objects, but built by minds. What am I?
I sit high glowing and watch the world go by. Without me everything would seem dull and dangerous. What am I?
I have roots nobody sees. I am taller than trees. Up, up I go but I never grow. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?