UD for me. The UD (full disclosure here, my UD experience is only on UA) is just like a nice little community -- kind of like FT. In fact, 2/3 of UD on any given flight is most likely taken up by FT members.

I certainly don't like the delay in getting down out of the UD, but for the 12 - 16 hours before that it is the best thing going IMHO.