Thanks for your responses, guys. I haven't looked much into declinations, but I guess that'll probably be my next go-to in my astrology research. This topic, though, is just something that has been bugging me lately. Another example of an aspect that I almost had is Mercury square Uranus. If I were born just a few days earlier, I'd have it. They still square by sign of course, but I'm not sure it makes a difference.
I'm leaning towards thinking that it's still possible to feel residual effects of aspects with very wide orbs. My mind works at a very frenetic pace and that speaks to Mercury square Uranus a bit. Grouping it with my stronger Mercury square Saturn aspect and my Mercury conjunct Mars, I feel like it makes sense why I'm so scatterbrained a lot of the time. My mind can be quick (Mars), but it goes off in so many tangents all the time (Uranus). And there's also a strong filter (Saturn). I'm struggling with typing this right now even. My brain is considering all of the ways I can word my sentences, and it's a frustrating feeling.
All of the "almost" aspects I have make sense to me. Sun square Moon, Moon opposite Saturn and Neptune, Mars square Jupiter and Saturn. Reading the descriptions of these aspects makes me see a bit of myself in all of them. In my early days of researching astrology, I was very dismissive of everything. I liked the mythology of it all, but every description I read felt like a generalization. Now that I'm older and a much more rational thinker, I'm maybe realizing why astrology isn't so black and white. Maybe the connection I'm feeling with these aspects is from the fact that all of these energies blend in so many ways to culminate in our being. Or... perhaps I'm just seeing what really isn't there. That's a possibility too. I don't know.
What about you guys? Have you ever looked at the charts of someone who was born a few days earlier or later than you were? Did you not think anything of it?