Crossfit approach: Performance oriented. Get faster and stronger. Do fundamental exercises like squats, deadlifts, and presses, which will produce strength that translates into real life activities. Do more work in less time, use proper form, and train your body to be an athletic machine. Build strength, power, endurance, and athleticism.
Bodybuilding/general gym approach: Work out to look good. Do silly things like bicep curls and leg extensions. Use the elliptical machine for cardio. Work your muscles groups individually, in isolation from the body as a whole. Whack off to yourself in the mirror.
And now that I have this new crossfit mentality, I have to admit... I'm a little embarrassed. I'm embarrassed because for so long, my only motive for working out was to look good; I can't believe I was ever so vain. And this is, in my now older and wiser mind, not the way to look at fitness. It gives me and everyone else in the performance realm a bad name... including crossfitters, power lifters, track athletes, endurance athletes, and anyone else who has real, substantial goals that aren't rooted in narcissism. Unfortunately, most avid gym-goers are still stuck in this bodybuilding mentality, only working out for aesthetic purposes, to look good for others. In other words, they're not doing it for themselves... they're doing it for other people. And here's what's wrong with it.