*How different is the nuance in these? "Our diet is full of variety" is a complete sentence. The reader doesn't know what type of variety, but there is variety. "Our diet is full of a variety" is incomplete. Let me list some examples: Our diet is full of a variety of fruits and vegetables. Our diet is full of a variety of grains. Usually, the sentence structure is: "Our diet is full of a variety of ____." Using this kind of sentence structure indicates the type of variety that is being defined. This car has a wide variety of different features. This shop sells a vast variety of clothing.

Conversationally, "I need to work on myself," would be the most natural expression.

Does this sound natural? If there are those who think they are more experienced and professional in the computer field than I am, then they are sorely mistaken. They shouldn't fool themselves. Also, they are being disgraceful and discreditable to their own customers by fooling themselves with such things. If I sound rude or boastful, I would like to sincerely apologize to my competitors. Normally, I would never be this type of person. However, regrettably, I'm required to be bluntly honest, which people seldomly do.

The Japanese go back to their hometown during the New Year holiday. The most traditional way to celebrate is eating soba noodles at night on New Year's Eve. We hope that the family can live longer and longer, like the soba noodle. On January 1st,* we go to a shrine to wish for our hopes for the year to the gods. After that, we eat “Osechi.” That is a traditional Japanese food box. Every food has its own meaning so that the new year will become a good one. For example, rolling eggs** stands for the prosperity of the descendants. We enjoy staying with my family and eating traditional foods. * "The first of January" can also be written here. **If you are talking about 卵焼き, I think you should say "Japanese style rolled omelette." So, the sentence should be: For example, the Japanese style rolled omelette stands for the prosperity of the descendants. If you say "rolling eggs," I imagine the actual eggs rolling.

Summer vacation in most schools started on July 22 in Japan. Last year, some schools were forced to shut down on weekdays due to COVID-19, so students had to go to school even during summer vacation. The athletic field is located next to the apartment I rent. I saw many high school students practicing tennis this morning. They had a lot of energy and and it looked fun. When I saw them, I couldn't help but feel energetic, too. I mistakenly thought I had as much energy as them, but the heat was killing me when I went grocery shopping. It was then I really realized I was very old and shouldn't have pushed my luck. (I edited this on my computer and didn't have the color-coding option. Sorry about that!)