For laptops, MSI or ASUS.
For Motherboards: ASUS or MSI
For RAM: Corsair, G.Skill, Adata
SSD's: Intel, Corsair, Adata, Samsung
For Cases: Coolermaster, Fractal Design, Corsair
For PSU's: Corsair, XFX, EVGA
For GPU's: EVGA, XFX, MSI, ASUS, PNY, gigabyte (really anything, but I try avoiding powercolor)
For CPU's: Intel
CPU Coolers: Corsair
Peripherals: Logitech, Coolermaster, Thermaltake, Corsair, and Asus