I disagree with this comment.
Your objection is reasonable. It is often considered impolite to analyze people based on their words, especially in public. It is often taken to be a slight on the recipient's status, as you took it.
As an actual disagreement with Vladimir you are simply mistaken. In the raw literal sense humans are non-mysterious, reducible objects. More importantly, in the more practical sense that Vladimir makes the claim you are, as a human being, predictable in many ways. Your thinking can be predicted with some confidence to operate with known failure modes that are consistently found in repeated investigations of other humans. Self reports in particular are known to differ from reliable indicators of state if taken literally and their predictions of future state are even worse.
If you told me, for example, that you would finish a project two weeks before the due date I would not believe you. If you told me your confidence level in a particular prediction you have made on a topic in which you are an expert then I will not believe you. I would expect that you, like that majority of experts, were systematically overconfident in your predictions.
Orthonormal may be mistaken in his prediction about your nihilist tendencies but Vladimir is absolutely correct that you are a non-mysterious human being, with all that it entails.
I used to believe people of any authority when they told me something that contradicted my internal experience, and endlessly questioned my own perception.
It gives me a warm glow inside whenever I hear of someone breaking free from that trap.
Sometime ago Jonii wrote:
When I'm hungry I eat, but then I don't go on eating some more just to maximize a function. Eating isn't something I want a lot of. Likewise I don't want a ton of survival, just a bounded amount every day. Let's define a goal as big if you don't get full: every increment of effort/achievement is valuable, like paperclips to Clippy. Now do we have any big goals? Which ones?
Save the world. A great goal if you see a possible angle of attack, which I don't. The SIAI folks are more optimistic, but if they see a chink in the wall, they're yet to reveal it.
Help those who suffer. Morally upright but tricky to execute: James Shikwati, Dambisa Moyo and Kevin Myers show that even something as clear-cut as aid to Africa can be viewed as immoral. Still a good goal for anyone, though.
Procreate. This sounds fun! Fortunately, the same source that gave us this goal also gave us the means to achieve it, and intelligence is not among them. :-) And honestly, what sense in making 20 kids just to play the good-soldier routine for your genes? There's no unique "you gene" anyway, in several generations your descendants will be like everyone else's. Yeah, kids are fun, I'd like two or three.
Follow your muse. Music, comedy, videogame design, whatever. No limit to achievement! A lot of this is about signaling: would you still bother if all your successes were attributed to someone else's genetic talent? But even apart from the signaling angle, there's still the worrying feeling that entertainment is ultimately useless, like humanity-scale wireheading, not an actual goal for us to reach.
Accumulate power, money or experiences. What for? I never understood that.
Advance science. As Erik Naggum put it:
Don't know, but I'm pretty content with my life lately. Should I have a big goal at all? How about you?