Wow... you all carry so much
But I'm not an MBC, so maybe that's the difference

All I have is the seat bag (keys, puncture repair kit, cell phone) and my pockets on my top (food - a banana or a couple of muesli bars, perhaps a windbreaker). And the bottle cage for 1 litre of water.

Thats me and my stuff

(LOL, def no room for a dog on my bike!)