One of the great things about this hobby is...
.. when it comes yor own personal preferences, nobody can say you are wrong. Some lile the plain old stereo through the analog inputs, others like the DPLII settings 'cause ou can manipulate all sortsa things, others like tghe Stereo 5/6 and ya know what? Nobody is wrong!
Me, personally, for music I prefer the plain old two channel stereo mode. Once and a while I'll spice it up with a little DPLII or stsreo5 but, on the whole, I prefer my two channels straight up.
But, ig tou have two channel video sources, such as VHS or some old DVD's that were cut in two channels, I will ALWAYS go for DPLII cinema mode. It works wonders on them old two channel movie soundtracks, which, IIRC, were actually called "Dolby Surround"