My favorite job alignments are these:

Bartz - Monk, Thief, Mystic Knight, Knight, Geomancer, Ninja, Archer

Lenna - White Mage, Black Mage, Time Mage, Thief

Galuf - Black Mage, Monk

Faris - Knight, Thief, Black Mage

Some cool combinations I like with the job classes that I remember are the following:

Job - Knight + Skill - Mantra or Build-up (Build-up is even better when either dbl grip skill or dual wield)

Job - Black Mage + Skill - White Magic

Job - White Mage + Skill - Black Magic

That's about as much as I remember. I like to be creative when it comes to picking skills for my equipped jobs.