Can't think of anything in particular. Since 1999, I've only used AMD CPUs but I don't have anything against Intel... it's just that every time I've been about to upgrade my computer, AMD offered the best value for the money at that particular time.
As for other computer components and peripherals, I've used pretty much every major brand over the last decade... Samsung, Logitech, BenQ, Microsoft, Asus, MSI, Epox, Hercules, Creative, Gecube, Sapphire...
Actually, I don't like Logitech any more. They didn't provide any Vista drivers for a webcam I bought 1.5 years before the OS came out. Also I've had many of their mice and joysticks fail within a year. For gaming peripherals, I'm partial toward Saitek products. For mice, I discovered a discount brand called "A4 Tech". Their products seem great and cost about half as much as Logitech.
I drink both Pepsi and Cola, as well as some discount brands I buy at the supermarket.