I mentioned that if I want to buy a camera I prefer Panasonic or Sony. Same for TV sets. For computer my preference is HP. My first computer was a Datamini, the present one is HP. But it doesn't mean I don't look at or buy other brands.
Haha, don't be mistaken. I am not making recommendations. I am not saying that these are better than other brands. It is just personal preferences.
But I think the following are some reasons why people prefer certain brands:
1. Because of their own experiences
2. What they heard from friends and others or read from reviews
3. Influenced by advertisements
4. The country of manufacture is important to them