Good question and hard to answer. I think both. But one side will be more prevalent depending on the timing. Not necessary mood, but I think being more lonely or more social for me is very related to current more common social changes. Like, before the pandemic I'd go out with friends 10x more than now. It'd be even seen as a ?? if I went a weekend without going out with friends or going to a pub rock bar and having fun.
It is less common now, so I guess my also legit lonely side, just liking the privacy of being alone ends up showing more now with society also becoming more on their own in general.
Idk form certain which side I prefer... Thinking now, I definitely see those times of more hang out and fun, way more socialization as a cool thing. But I definitely remember some bad, sad feelings that were consistent too. So... Idk, I think I (many ppl too) have the natural tendency to imagine a certain era as better as a way to have an answer whether true or not to current struggles.
But I think it needs a balance. Like in the pandemic, when it was safe to have parties and all it seemed like a dream and that before it felt like being in prison. I'd even be like how would I not enjoy life before, I had freedom, I was in heaven! But with time we get used to normalcy and the feelings become kinda all relative...
Tldr I think both sides are strong on me. Balancing is key. When one ends up becoming too above the other, I imagine the other side as better and vice versa. But I don't know what a balance of both sides would be either. I see it more as a social phenomenon that makes one side grow stronger to a point I need the other side but it's a social phenomenon, then it'stotslly upon the individual to change IMO.