Yeah, I am getting/understanding the semantics of both sides of this 2.0 vs. 2.1 question. Strictly speaking, 2.1 nomenclature would imply the existence of a separate LFE channel. But, it seemed pretty clear to me that what was meant was just the use of a separate subwoofer for reproducing the low-bass content of the original 2.0 channel signal. So, it was intended more as a "stereo with or without bass management" discussion, and not really about the signal format.
As someone noted, the question was about how you like to play a 2-channel signal, even though the nomenclature used was not 100% technically accurate.
My own answer is that I just use my front speakers, which are both full-range (down to below 30 Hz.), with all of the DSP processing and bass management turned off. It may be that some of the improvement that I hear in my receiver's "Pure Direct" mode is all in my head. But I can't get it out of my head, so that's how I listen!