You can want literally anything in a partner. Success here isn't going to be so much dependent on meeting your criteria as it is on figuring out which qualities are too important to compromise on, which are just things that are kind of nice, and which are things you can talk about and reach some sort of basic understanding on. For an example on this last, "I want someone who will talk to me about their problems and let me talk to them about mine." - do you really need absolute transparency here, or can you find middle ground because (again, for example) it's really about trust more than the speech, and so letting some things go unsaid might actually support that better. How much of that clarification is something that you could have filled in by a dialogue with a partner, instead of by plumbing the depths of your own thoughts?
You also need to keep in mind two caveats of figuring out what you want in a relationship. You need to know which things are qualities you want in an SO, and which ones are qualities you want in somebody in your life. That is, you need to know for which things you're willing to say, "I would rather be in no relationship at all, than in one that lacks this", because that will usually be the choice you have to make. You also need to realize that, while knowing what you want is very important, you shouldn't treat it as a checklist; you're likely to find real relationships to be a bit too spontaneous and fuzzy for that. You know this, but you can't foresee everything; you may meet somebody who excites you in totally unexpected ways, or somebody who checks all the boxes yet is totally unattractive to you. In either case, you shouldn't let your formalized articulation of what you think you want take the place of what you do want, but neither should you totally ignore it.
For instance, I want somebody I can have a good argument with. Not a fight, necessarily, but somebody I can disagree with and keep on loving without endangering the whole arrangement. And, moreover, somebody whose perspectives offer me a challenge to wrap my head around, because they are not thoughts I've already had for whatever reason. I don't think I'd ever actually need to have an argument to prove it, but that's the sort of thing I look for. But I've gotta be realistic - this does cut down my options a lot, because there doesn't seem to be as much overlap as you might expect between A) people who have strong opinions and are willing to discuss them at length adversarially, and B) people who do not need external validation of their opinions and will not feel as though I'm attacking them. And there's nothing wrong with either of those qualities, they just aren't what I want out of a romantic partner. And that's fine because I'm pretty comfortable not being in a romantic relationship; it's the status quo for me, at this point, which helps a lot.