Easily the best class or at least in the creative sector.
First of all, the history of the class
The Guardian dates from back when there was only AQ. Being a guardian was like top-notch. You had tons of perks and you knew you supported AE with the development of their game.
Being a guardian is cool, still and as such, always has this nostalgic feeling no matter what game it was used in.
The training of the class
After you confirm your guardian account on your DF account, you instantly get sucked into it.
You do avrious quests, collecting different items all just to become a better guardian. It really gives you a feeling you are improving yourself to get better doing different kinds of training.
Even getting the signature weapon involves doing a quest with a special room where only guardians can get the sword.
And of course we have the Guardian dragon that of course made it all the more fun. I am still sad you can't redo this quest. :p
And finally, the class itself
In the whole game, Guardian does not really make a strong appearance. It has mediocre skills with a bit of this and that. But the skills themselves make sense for the class and are all unique in their own way.
Having a random element spam attack rage skill, using the guardian shield to protect yourself or summoning the guardian dragon to egt a free message and a flame on the opponents behind.
I just love the class in every possible way and I have used this class a long time for it was just so fun to use.