Rolling a Paladin in World of Warcraft is a great choice.
You may ask why.
It is because you can fill any role (tank, DPS or healer).
So when you get bored with specific role, you can always respect and start gearing up in your new role.
When it comes to the leveling, be aware of some facts.
WoW Paladin Fast Leveling Guide - Which talent tree is the best for leveling? First of all, I need to say this to you: stay away from Holy talent tree while leveling.
It is mainly for healing and has very low damage output.
But as long as leveling (questing) requires killing many mobs, this build is just not for leveling.
The other two (Protection and Retribution) are both quite good to do the job.
I would say that if you are Retribution, the leveling in a bit faster.
This is because this talent tree is for powering up your damage output (using a two-handed weapon, of course).
But Protection is also good.
And most of it: fun.
As Protection you become very hard to kill.
But it lacks a damage output against single target.
So if you want to level fast as Protection, you need to do the quests which require you to kill many mobs.
So you can pull them all and kill them all instantly.
WoW Paladin Fast Leveling Guide - Questing? Absolutely! Questing is still considered as the best way of getting XPs (experience points).
This way of leveling has the highest XP/hour ratio.
But unfortunately this is a bit tricky.
A huge number of quests are there just to slow us down.
You spend a lot of time to complete them and reward you with very little XP.