I use a largeish cross body bag but am getting so frustrated with it as it's so deep I can never find anything! I don't use a separate bag for work as I like to know my purse etc is in the one place and I can just grab the bag and go. I like the cross body for when out with kids although I do find it pulls on my bad back a bit.
It's just so deep and dark though that I can never find anything quickly! Even when I empty it out before long it's stuffed with child related things and then paperwork from work, letters etc as well as random bits if makeup, handcream etc.
I also use a changing bag for 1 year old but often find I'm lugging that around when all I really need is a drink, snack and spare nappy. I daren't be without it though just in case!
How do you organise your bags and keep them neat, tidy and organised?