Carbon most often makes what kind of bond with other elements?

Most of the time it makes a covalent bond because of how many valence electrons it has. It has a 4 making it

.

. C.

.

This makes it relatively easy to for it to form a covalent bond with, or a bond that shares an electron.

Take a something like CO2

C has 4 electrons

O has 6 electrons

C will share 2 of its electrons with one O and 2 with the other O

This molecule now satisfy's the Octet Rule.