I'm so far from metro and I wear something every single day and for every occasion. It is just something that defines me and if you want to do that then there is nothing vain about it.
Obviously we like when someone appreciates smelling something good on somone so there is some attraction of attention but you don't need to look desperate about it and dump a bottle on you everytime you go out. You'll wreak!
So, to answer you question... I say wear it daily if you want to. Would you rather smell like everyone else or a little better? That is up to you. I say go for it. I'll be doing it for the rest of my life... everyday...