I don't like Starbucks because its to me it always tastes bitter. Coffee snobs will tell you that its "robust" or some shit like that, but its just plain bitter to me. (same with you beer snobs and your dark imported beers that you drink warm. blech!!! just give me a frosty coors light and I'm happy). In other words Starbucks is "Good" coffee if you like "real" coffee. Honestly, I don't. I grew up with my parents making Folgers at home and my dad buying Dunkin Donuts on the road. To me, thats what coffee should taste like.
Also, don't be afraid to add a little milk/cream/half-and-half. Again, the purest will tell you you're ruining your coffee but to me, its like drinking whiskey on the rocks (or adding a little water to a single barrel scotch) -- it takes the bite off so you can enjoy the complex flavors behind it.