After about eight months, my Mint Debian has been broken beyond reparation. So I decided to wipe it out and do a fresh installation. This time I am not pointing directly to the Debian repository but to the Mint repository.
I like Mint Debian better than Mint main edition. I have come to the conclusion that as long as I am not directly pointing to the Debian repository (or at least not taking every single update everyday), the installation should be stable enough as my main workstation OS.