It is somewhat cliche and predictable (the Trooper is far worst in the latter regard). But it has an Epic feel, is rather well-written, and has a sense of importance and urgency. A moderate spoiler about the story:

This. As a level 50 Sentinel specced as Watchman, I want to say that you this class isn't about putting on Force Might, and then leaping into enemies and trying to spam attack abilities (I am not saying that the reader definitely does this). To be effective, you will want to keep Rebuke up and use Saber Ward when Rebuke is on cooldown. That should make you bleed a lot slower. On top of that, put up Overload Saber and similar abilities up a lot. I was also really above my content. At my peak, I was 9-10 levels above my content, and even ceased gaining XP from anything on my current class quest planet. Another advantage of Watchman, is that point-blank Force leap effectively gives you an extra interrupt and a focus builder. Which can make fighting casters and PvP a lot easier. That and Merciless Slash is awesome. Earlier today, I got on my Sentinel that i mean to eventually replace my current one as my main and tried out some PvP. After getting used to having to put up Defensive Cooldowns and the like, I went into a Warzone of 30's-40's as a level 15 Sentinel with crappy abilities and wiped the floor with everyone else. I got back to back MVP with no stims or medpacks. All I did was place up Defensive Cooldowns and use my pre-obtained knowledge of the class's mechanics, and I proceeded to tear through enemies that were much stronger than me. That is without any of the Interrupts or any of the awesome abilities we get later on.

Just wait and play the Story. When you get to talk to her seem to be driven by at what point you are in the story, not how much affection you have (although that allows you to have them when they become available).

This. On my Sentinel I actually have to use many of my different abilities and it provides a Challenge to play and I have to think. On my Sorcerer all I do is sit back and mindlessly spam different 3 Lightning Spells or heal my companion. The Sorcerer definitely is much easier to play, but it isn't really as fun as my Sentinel.