I've been shaving since 13 (when I had a bum-fluff mustache). I need to shave every day, but usually end up shaving every third day because I'm lazy about it.
Yeah the Mach 3's aren't bad. Had one for a while, but I'm a sucker for the flexible blades Schick have.
The Schick Xtreme III has three blades like the Mach 3, but they're flexible as well. Nothing shaves quicker, and I rarely get any nicks and cuts, where as I used to with the original Schick series.
I don't use shaving foam, I use Shave Oil instead now. It's good stuff, it's got macadamia nut and wheatgerm oil, vitamin E, French lavander, geranium, bergamont and sandlewood essential oils. That's one major reason why I rarely get nicks and cuts now. There's no red-ness and it doubles as a decent after shave.