In keeping with the surprisingly civil tone of this thread I'm happy to answer the OP although as penguin and worrahave said, there's no need to justify.
I FF from birth each time. I didn't want to BF.
I wanted to regain bodily autonomy. I didn't want to feel almost permanently attached to a baby or be constantly touched and grabbed. I'd had 9 months of feeling that I was everyone else's property! I still don't like being held on to, clung to or to feel in demand like that.
I wanted my figure back and didn't see how going from an active lifestyle to a considerably more sedentary one was going to achieve that (people will argue that BF reduces weight but I'd seen the opposite occur. I was back in my size 8 jeans within 2 months of each birth).
I didn't want to be tied to the sofa 24/7. I'd have gone bananas! I wasn't prepared to dedicate the time necessary to BF, the cluster feeding and the lengthy feeds.
I was totally unwilling to put myself through avoidable and unnecessary pain and discomfort. To this day I can't understand why anyone would do that!
I wanted to point to the the formula and the steriliser, hand baby over to DH/nursery nurse/friend, say "There you go!" and head out of the door without needing to go through time-consuming, possibly painful, unnecessary preparation first.
I didn't want to feel any more tired and drained than I needed to. I didn't want to look any more tired and drained than I needed to, I didn't want to be the woman with the breast pads and the maternity bra.
I've never been judged for my choices (or maybe I have, just not in my hearing!).