Fallen Empire takes the cake
As you can see, the reviews are all over the place for this game and that is due to the fact that the game has a lot of stuff, some of which is good and some of which is bad, and the question is: will you find something that is fun for you? The answer might be yes, but you will have to find the strength to ignore a lot of the garbage, and you will sometimes need luck to stumble into the right stuff. I was lucky to pick the Imperial Agent as my first class and I enjoyed its story and the open world I played in, but some of the other storylines were so offensively bad that I quit half-way.
But I mostly came here to tell you that I was impressed by the latest expansion packs relating to the new Zakuul Empire, starting with Knights of the Fallen Empire. It is strongly reminiscent of the old Knigts of the Old Republic games, the art composition looks better than before, and if you continue this story with one of your existing characters, then the story and dialogue of the expansion pack accounts for that, making it feel like story was made for your class only, despite the fact that there are 8 different classes in the game. In fact, since you have the option to start the game at level 60, I would say that the new expansion packs (after the Shadow of Revan because we don't speak about that one) should be reviewed separately due to how different they feel. You hardly ever even see other players, which makes this almost a single player game, but you can still get the benefits of the MMO if you go back to the main part of the game.