Agent is pretty fun if you like to play a bit of James Bond in Star Wars. And the look at a society full of force users as a "normal" person is also pretty interesting.
Most stories are pretty good, to be fair to Bioware, I also really liked the Light Side Sith Sorceror Questline. Rags to riches, but well done.
Gameplay wise i found Warriors as Marauder/Sentinel the easiest to level, their self heals and cooldowns make it really easy.