Voted; I've done three (one on converted mtb; two on flat-bar road bike). Will do more as/when the mood takes me.
I've absolutely no interest in 'goals', or organized/charity/group rides etc. Ride alone ... always; for me, that's a substantial part of the point of cycling. In all three instances, I just set off early one morning with no particular objective other than doing a (long) distance ride that day; morphed into a 'century' (yes, true Imperial century).
I've little doubt such a day will come again.