I always found the biggest headache with Paladins is their unwillingness (or outright refusal) to associate with anyone not of a mostly-similar alignment/ethos/outlook on life; which in our crew invariably runs smack into a general preference for playing characters who aren't necessarily always Good (or Lawful, I treat the G-E and L-C axes as having equal importance). Not that they're all Evil, mind; but there's often a lot of L-T-C Neutrals floating around.
I've fixed this*, I hope, by designing Paladins to fit any of the four extremes (LG,CG,LE,CE); in hopes that CG Paladins will be more likely to fit in to typical-around-here adventuring parties and that LE and-or CE ones will give me some potentially interesting foes to run.
I've already got some 'unofficial' ideas as to how a CG Paladin would work in play, as there's a longstanding PC in my current game who - though technically a War Cleric - has been in some ways played like a CG Paladin for most of his career.
* - in theory. It's a relatively recent thing (as in, last year) and nobody's rolled up a new-style Paladin yet; nor have I managed to yet work one in as a foe.