I know you are going to dread doing this, but I actually want the long justification. I tend to reconsider my type a lot, so it'd help me if I saw the justification and your reasoning for typing me as an ISTP. Meanwhile, I'll go and read a couple descriptions of ISTP, INTP, AND ENTP...
Well, you don't identify as particularly feminine; not to stereotype, but that puts you into T over F right away.
You knew you were a P already.
Your behavior is unsocial as you explained, but not aggressively so. That seems I, and puts us as IxTP. The neutral feel is a reinforcer, as it fits with IxTP.
In choosing ISTP vs. INTP, note that INTP is an Ne dom whereas ISTP is an Se dom.
In your post, you seemed 'stuck' on what things around you looked like. You had nothing on your mind to talk about, so you started talking about the objects around you, branching off into other things, and then using appearances again as a seguay into other topics. That's a very Se way of talking.
Se is just seeing what is around you, perceiving and observing directly. In that sense, the Se user's 'world' is what they see around them at the moment. You would only be aux for Se, but still, that's your extraverted function, so it is your primary way of taking in information.
Finally, you quit posting when you ran out of stuff to say, which was basically after you finished naming things in the room plus the other things the stuff in the room reminded you of.
An INTP, as an Ne dom, by contrast has little connection to their environment. If you see them post, it is generally about philosophy or detailed systems or something; you are a Ti dom too so you would build systems in much the same way, but the difference is that they might talk of nothing else because their attention is on what 'isnt' there', so to speak, whereas Se is focused on what 'is' there.
You also talked of wanting to experience the world; that's an SP stereotype. And if you are SP, you definitely aren't one of the ExSPs, so that leads back to ISTP or ISFP. ISFPs are very unobjective because they are dom Fi; you seem neutral and objective and Ti-ish, not like an Fi user at all. And you never talked at all about connections with others or anything like that, which makes sense if you are ISTP or INTP because they have Fe inferior.
So, if you are IxTP you have probably experienced so-called hyper-emotionalism perhaps in the form of outbursts of anger, or a 'martyrdom' complex where you think people are victimizing you. IxTP don't use emotions for decisionmaking, like to be independent, don't want to be told what to do, but at the same time aren't 'big' people compared to ExTPs.
For the reasons I outlined, ISTP seems more likely than INTP.
And those are about two-thirds of my reasons; I have to get on to other stuff now, but follow my reasoning and 'troubleshoot' what I said to justify each function, and if you agree, then ISTP should be your conclusion.