Breast.
I've breastfed all my four children - eldest is now 18 and youngest 5 months. Luckily, with the exception of the latest addition, its been very, very easy. No cracked nipples, no blocked ducts, no mastitis - in fact it was the most natural and easiest thing to do. I wore my babies and fed them on the go even at work. I breastfed them all until on average well over a year old.
Unfortunately, due to illness, I have had to give up breastfeeding little James at only 4 months old. It has been probably one of the worst periods of my life. I have been judged by people that don't know me or the reason I have had to give up. I have been 'tutted' at, given long and evil stares and ignored all because I am bottle feeding.
I don't know if there is a moral to whats happened but if there is one I think its that i would like ALL mums, wether breast or bottle feeding, to be a little more accepting of other parenting styles, be a little more thoughtful with each others feelings and be less judgemental. The boot could quite easily be on the other foot one day...