Damn fellas, not only are they convenient for letting you know the time and in some cases the date, they can also be quite fashionable.
I'm in the never without one camp. I currently wear a Raymond Weil two tone Freelancer Classic daily. I also own a Rado, Bulova, ESQ, and three vintage watches inherited from my father (Longines, Wittnauer and Omega), but I've never worn any of them.
The next one I buy will be something special and for the long haul.