Maybe it's only me, but I'm finding persuade options to be very interesting for my experience as a player. When to use them and when not to use them is a constant struggle, which I think is great. Using persuade to force that big thug on Coruscant to surrender? Yeah, no problem. Using it to get the Twi'lek pilgrims to back down? Sure--it's a dire situation and probably the only way I could spare their lives.
But then you get some really, really interesting ones. (2 Spoilers for Knight quest through early Alderaan, with as little Knight plot info as possible)
First was on Tattooine, when you face Lord Praven. He's a light-sided Sith Lord--he's deeply loyal to the Sith due to his pureblood heritage and sense of honor. So much so that he spares the lives of Republic innocents where ever possible; he considers it shameful to kill someone who is not a warrior. To facilitate that, he actually offers you the chance to have an honorable duel so others don't get in your way, which would save many lives regardless of who won (something very important to him).
Before the duel, you have the ability to try and make him understand that the Jedi are not the destroyers he believes they are (he doesn't see the evil of the Sith, and is convinced that the Jedi exist only to exterminate his people) or to Force Persuade him into helping. That really made be think. He offered the honorable duel as a way to save lives, so would using FP be fair? I ultimately decided not to, and just tried to convince him the Jedi weren't evil. We fought, yes. But afterwards, I had the option to spare him and then even got him to joint the Jedi. Before that, though, I was curious as to what FP would actually do so I tested the conversation (after making my ultimate choice) just to see--turns out he'll give you the code you want, but then be outraged at your trickery that he attacks. I'm guessing you lose the ability to convert him.
That was a very hard decision, lol.
The other one was the first quest on Alderaan, which I actually regret my choice. Without revealing too many details, an unfortunate death leads to your knight getting arrested along with another scientist. You are able to convince them to let you go free, but the scientist gets imprisoned, or force persuade them into letting you both go. I chose the latter. And, honestly, I really wish I hadn't. The interesting thing is that I suspect my decision was the greater good choice, for reasons I'm putting in the next tag because they're actually a big part of the Alderaan story.
The scientist was a Sith Assassin, and actually the one who killed the count. If she's jailed, I suspect she would have killed those guards. So persuading them to let us both go free actually saved their lives. But I still think I made the wrong decision. They were being more than fair in letting me go free as long as she stayed imprisoned as well, and Alderaan is a bastion of equality. I feel like I just smeared mud all over that. I actually decided I wanted to choose the other option before the conversation ended, but the game lagged and the esc didn't register until the convo was over (the next quest starts instantly upon completion of the scene. What's interesting about this choice in general is that there's no real implication about her going free or not until later in the story--you're forced to make a choice without much info to go off of, and it's interesting.