Used my D750 for the first of many weddings this year yesterday. Ridiculously good, it just gets out of the way and let's you shoot all day without worrying about anything. Auto ISO with a 12,800 ceiling and 1/160 minimum shutter speed, plus back button AF in AF-C (meaning AF-C and AF-S on tap instantly) meant I pretty much only changed aperture during the day (and occasional use of Highlight Weighted Metering, which I assigned to the Fn button).
50 Art was my bread and butter, first time shooting a wedding at 50 instead of 35, not too bad at all but on balance I think the 35 is the more versatile option and I find it has a nicer quality too it (can't put my finger on how, exactly).
The 135 DC was great fun to use as well, didn't once feel a 70-200 would have been a more practical option, keeper for sure.
The only thing I missed was the near silent shutter of my Fujis for the indoor ceremony.