For TV: most of the time now, dts NEO:6 CINEMA, it's got a nice enveloping soundfield and it doesn't collapse EVERYTHING to the center channel like DPL2 does; and every now and then, Logic7 Enhancement, again a nice sense of envelopement, just not as clear as dts NEO:6 IMO.
For music: for serious listening, good old fashioned 2-channel stereo; if I'm doing something that requires me to abandon my sweet spot, 5-channel stereo.

Big L