To be honest I like all the designs I felt they are all unique in appearance. I may not like everything about each set, but I appreciate diversity among armor sets. These are definitely diverse.

To be honest My favorites are Dragoon, Summoner, and Astrologian. Close second would be warrior and monk. My least favorite is the Scholar/Black Mage. The rest are all well done as well, to be honest it's so hard to pick a favorite! I wish all sets were unique to each class like these ones are.