I agree, the MMPI is pretty much the only one I can think of that's so long.

I must say I didn't like that test at all. It didn't yield any surprising results for me, but I don't like the "lie detector" questions that they have in there, because in complex situations you can show up as being untruthful when you're not. I don't think it's appropriate to have that lack of trust in a therapeutic setting. Moreover, the very fact that I know they'll be checking my answers for "consistency" makes me nervous about taking the test because I don't want to show up as a "liar" (even though I'm not), and so that in itself makes it harder for me to answer the questions without overthinking it.

I also agree with Soupe that a lot of psychological tests have poorly worded questions, or questions that are basically taken verbatim from the symptoms of some DSM diagnosis, without any room for nuance. It happens often that there are questions in there that I can't answer with "agree" or "disagree", or even on a five-point scale, because the real answer is, it depends on something that's not reflected in the question. The real world is not as clear-cut as those questions. And I don't like knowing that people are going to draw all sorts of conclusions about me based on some test, without giving me the opportunity to clarify what I mean by my answers. I much prefer talking to a human where I can actually explain things the way I mean them. I think that's the only proper usage of such tests: to start a discussion. Nothing more. I hope that's how it will be used for you.