Eight happens to be the number of Thurston’s model 3 geometries: $R^{3}$, $RP^{3}$, $S^{3}$; $S^{2} \times R$, $RP^{2} \times R$; $S^{1} \times S^{2}$, Nil, and Sol. The fact that there are eight different particle families in the Standard Model is, perhaps, no coincidence in lieu of this information.
Then there is the eightfold path of buddhism, which is supposed to act as guidance to find the middle path- a path that, according to the ethos, supposedly should bring peace, temperance and happiness to the practitioner. It is perhaps no surprise either that eight is a number considered synonymous with luck and wealth in certain countries in east asia, which is where buddhism arose.
The Octonians are a number system with eight roots of unity.
In Terry Pratchet’s discworld, the eighth colour is the colour of magic, Octarine.
Not to mention that eight is the first cubic number (after one, but that doesn’t really count).
So I think you will agree that eight is a pretty cool number.
