Aside from all the health benefits, how about the fact that formula costs thousands of dollars per year? That alone was enough for me. And if the baby has any allergies, it's easier and cheaper to modify your diet than it is to buy super-expensive allergenic formula, only to find out the baby's still allergic and you have to invest $50.00 in ANOTHER type of formula, til you find one that the baby can eat.
Plus, have you ever smelled formula after it's been sitting out for a couple hours or so? I almost hurled once at my SIL's house helping her clean up when I put the day's bottles in the dishwasher. That smell is worse than sour breastmilk any day.
You can feed the baby any time, anywhere, without getting water, making up the bottle and finding a microwave to heat the formula.
Also, a formula-feeding friend of mine is astonished at the teeny tiny diaper bag I carry, compared to the overnight bag she has to haul around to accommodate all the bottles. And you don't have to go to all the trouble of washing/sterilizing bottles (until/unless you go back to work, that is).
At first, I didn't believe that breastfeeding was easier, but now I can't imagine preparing bottles every day, except for the milk I pump at work for DD, which gives me a nice excuse to take a break every couple of hours--and even on bad days I can feel like I've accomplished something that day!