Can you guys break down 3 classes for me?

[FreyaCrescent]

I just reached 20 on my lancer despite how cool dragoons look im not all into the skills. Im looking into possibly playing a warrior or a scholar im playing on ps3 if that makes any difference? Im kind of wanting to play a class that is needed/least played i know you can max everything but classes like scholar require me to focus mind on arcanist etc.