All of the above work well, flatties especially respond well to anything that is put in front of them. The BIG bream baits I use however are different. I learnt the technique of member Stebobo, a mate. Caught a 1.6kg bream in a matter of minutes. Bread in the center, cheese and old chicken on the outside. The cheese and chicken give off oily scents and strong smells, and the bream are attracted to it. Then the bread, cheese and chicken in combo keep them interested so they decide to take a nice big bite.
The only thing is though, I haven't caught many small bream with this. Only relatively bigger ones, so if you are looking for loads of bream, I would use hawkesury prawns (green ones SUCK!). Flatties respond well to most baits, but a wavy strip bait will grab their attention, or a poddy mullet or yakka.
Hope this helped,
henners