Starbucks is not TOO expensive compared to other coffee places. If you get extravagent, then you can really hurt your wallet, but just a cup of whatever you like is only a few dollars. If this keeps you from the fast food joint or the convienience store, it evens out. If you are hooked, buy there too often, then invest in those machines that allow you to make fancy stuff at home.
I prefer Caribou Coffee, or local brewhouses, but Starbucks is everywhere, easier to find.
Starbucks employees must be taught to act snobby. I remember ordering a small, medium, or large- the employee trying to correct me and asking if I wanted talle, grande, or vente (I think that's right). I never let them correct me. I say again "medium, you know the middle size." But don't piss them off, they are making YOUR drink.