I haven't used DAO that much, as ADO became the default in A2K and A2K2, but since DAO is now the default for A2K3, I am probably going to start using it more. Pat Hartman has posted that DAO is actually much more robust when using the Jet Engine than with ADO and DAO can do more than ADO when used with Jet.
I liked ADO myself due to the fact that the syntax seemed easier to me than DAO.