My siblings and I were all breastfed. No allergies, but we went through the same childhood diseases as everyone else. One of my brothers and I also suffered from mild asthma. We have a very normal relationship with our Mum- very comfortable around each other, very comfortable away from each other.
ETA: I'd say we are all pretty smart- one is a diesel mechanic, one owns her own audiology business, I'm a teacher and the youngest is a fitter and turner who gets sent all around the country by his place of employment to oversee jobs.
I BF my boys, and they get colds and illness like everyone else. They are more attached to me than their Father, but I put that down to him always being at work and me doing the majority of care for them.