My opinion of Jedi Knight, Smuggler, and Bounty Hunter
Well, I see I'm a year-and-a-half late in responding to this thread, and it looks like the person who started it probably won't be coming back to this site, since this is their one and only post. However, for the benefit of anyone who may read this thread in the future:
I have only finished the storyline for three of the eight classes: Jedi Knight, Smuggler, and Bounty Hunter. Of those three, I liked the Jedi Knight story best.
To me it seemed like the things that happened in the Smugger story didn't have a very big impact on SW history. It just didn't seem very important compared to some of the other things that happen in SWTOR, and the story was kind of disjointed and episodic.
As for the Bounty Hunter, like the Smuggler, the story seems to be made of events that are relatively unimportant until the very end. It's kind of hard to describe my problems with it without giving spoilers, but it wasn't my favorite.
I liked the Jedi Knight story because it felt like you were doing important things that mattered on a galactic scale, and there were some pretty cool plot twists.
I hope to complete the story lines for each of the eight classes, so I may have some more info later.