When I started shaving at the age of 14, I used disposable two-bladed Gillettes, just like my father did. I usually wore some form of razor burn until about five years ago when a friend gave me a Gillette Mach 3. I've used it ever since. The three blades get everything in one or two strokes, it's easily washed out, and the flexible blades and hinged head make it a very accurate razor.
I also have a Schick Quattro, but I find that the closed back to the Schick prevents me from effectively cleaning the blades between strokes, and the excess width makes it less maneuverable in tight corners.
So I still use the Mach 3 as my razor of choice.
What do you shave with?