We like the mooring best for many reasons:
Easy to sail on and off short handed. Boat is head-to-wind and sails go up and down without a hassle...even single handed.
Fewer lines to deal with...in a slip you need Breast and Springs lines on both sides with enough scope to ride the tide (so you don't find you boat hanging from its lines).
Pain in the butt to come and go...dodge other boats, navigat narrow passages with an engine that pulls to port in reverse...etc. Means fewer sailing days...easier to put around from the dock.
The boat is just happier on a mooring.
Better ventilation in hot weather...put up a wind-scoop.
Better visibility...no big power boats flanking you and ruining your visibility...
and many more, but it's late and can't think any more.
Chris Craft Apache 37 S&S sloop
I'll add a couple
Privacy from your neighbors,
no nosey dock neighbor walkng past at 5 am,
no loud stereo blasting from you next door neighbor who loves Rap or Hip Hop,
Courtney is My Hero
If a man is to be obsessed by something, I suppose a boat is as good as anything, perhaps a bit better than most - E.B. White