Dell, HP, and Lenovo are popular brands of laptops. Actually, every brand has its pros and cons. And the answer might be different from person to person. Generally speaking, the build quality of Dell might be better than that of HP and Lenovo, but it is more expensive and most Dell laptops have a rough touchpad. HP and Lenovo have more attractive designs. For more differences, you can refer to this post: Lenovo vs HP vs Dell: Which Brand to Buy.