根据所提供的段落，编辑并优化每个句子的语法和语义。
自行撰写一个含有多个句子的段落，需要包含一些常见的语法和语义问题，例如错误的主谓一致，歧义，使用词汇错误或模糊措辞等。
原始段落：
He don't like to write, but he loves to read. His favorite genre is science fiction. The plot is always confusing, and characters lack of development. He always finds the story difficult to follow, but he enjoys the imagination.

编辑后的段落：
He doesn't like to write but he loves to read, especially science fiction. However, he often finds the plot confusing, and the characters underdeveloped. Despite the difficulty in following the story, he still enjoys the imaginative world created by the book.

自行撰写的段落：
John had planned on going to the park with his friends, but they cancelled on him. He was feeling really annoyed, and decided to go on his own. The park was empty, which suited him just fine. He laid down under the trees, listening to music through his headphones. Suddenly, he saw something out of the corner of his eye. It was a squirrel, and it was munching on something. John wondered what it could be. He walked up to it, but the squirrel scampered away. John looked around, and saw that there were other squirrels too.