The problem with owning a BH is you will do projects that you normally would not, owning a BH creates work. Now that I think about it owning a tractor creates work.
Here is a few for me.
For myself
Dug the footings for an addition on the house
Drainage ditches and keeping them clean and or digging them again
Burying horses and other large animals (boy I hate digging these by hand)

Dug out a small pond
Dug out a small spring and set 2, 4ft round x 4ft high tiles to make a water holding tank for the barn.
Water lines (4 ft deep)
Septic leach fields
Post holes for my new deck (4 ft deep)
Dig out for Volleyball court
Set electric pole
Dig out for pole barn
Dig out for retaining walls
Dig out corner post holes for fencing
Dig out tree stumps
Dig out large rocks
Moving smaller trees (for the wife)

Electric lines
Rock garden (couple times, the first one is never right)

Finding septic tank lid
Dig out for Hot Tub

Setting Hot Tub

Dug out for an above ground pool (then gave the pool away and filled it in a few years later)
Backing into things

(don't ask)
For others
Burying horses
Water lines (4 ft deep)
Septic leach fields
At least twice a year something or another for a neighbor
Electric Lines
Dig out for foundation wall repairs