For me, Goto starts on a wrong foot with me due to his obnoxious attitude of "you're stuck with my company, and if you don't like it, I'll blow up this explosive inside me that I'm bluffing with". Ever since Kotor 1, I've been sick of people unpreventably getting access to my ship whenever they feel like it, on the writers' say-so. Like the idiot who infested it with gizka.
If you do actually take him with you, he has a good deal of interesting interactions with the NPCs you meet. And Goto's backstory is kind of interesting, what with the Asimovian breakdown due to conflicting imperatives, I'll give him that.
But in person he's basically a walking - well, floating - caricature of himself. He also remains annoying because he has no positive plan for helping the Republic, and if he says he does, he's full of sh#t. All he does is say "no": "No, Jedi, you can't go free, because you're disruptive, but I magically expect you to save the Galaxy anyway." "No, don't buy fuel for Telos from the Hutts, it'll hurt the Republic (and I offer no better plan to avoid the looming disaster, either)". And his Jedi bounty was so ill-specified that it led people to try to kill the Exile, mistakenly believing that a dead Jedi will also be paid for - even Slusk, who is an Exchange boss himself, believes this. All this makes me see Goto as basically a lot less competent than he should be, given his stated background.
I still enjoy unlocking his story, but I never use him afterwards. And I unlock his story through negative influence, not positive, every time. (The only other character for whom it's true is HK-47, when I'm LS, but that's because it would be really hard for a Lightside character to get enough positive reactions out of him. Goto on the other hand I just prefer to treat like dirt.)