And even then, it's all relative. My goal is just not to look too messy by 5pm. If I get a shave that's TOO close, I start getting in-grown hairs, so I can't get away with going against the grain. So my definition of success is:
1) Shave daily
2) Relatively injury-free
3) Clean-looking face
4) Reasonably free of irritation (that all redness is gone within 30-60min)
Ofcourse I have sensitive skin and this is based on the electric shaver standard since I find it less irritating than a disposable.