Would you mind explaining why?

I could make up a story, but how would that help? The fact that I felt drained is a very direct observation. It's data. I don't have a counterfactual universe where I could alter certain factors about the weekend to see which of those factors is responsible for me feeling drained.

I find it hard to really connect with most people I've met through LW in a way that gives me the fuzzywuzzies

That interesting. Do you find it normally easy or hard to connect with people? Are you a computer programmer or something similar?

At the community camp in Berlin I got the feeling that maybe the idea that introverts get drained by social interaction is wrong. They get drained by interacting with people who are not like them. Many people at the event reported that they normally feel drained through social interaction but didn't at the event.

I'm personally normally not drained in energy by social interaction but felt the weekend incredibly draining.

I don't know if this applies so much in America, where you don't choose your degree ("major"?) until after starting university ("college"?), but I'm sure there are other UK/elsewhere people reading too, and perhaps this has some broader relevance as well. So... one thing that I wish I'd borne in mind when I was making decisions and torn between going into several different fields. Switching between fields (mid-degree, after your degree, for your graduate degree(s), whatever) is totally possible and loads of people do it, but a general pattern I think I've observed is that it's a lot easier to switch from a more technical field to a less technical field. So, all else being equal, if you find yourself wavering between two or three choices of study area, I would be inclined to advise you to pick the most technical one. (I'm aware that there's some potential handwaving here about what "technical" actually means. I think the useful interpretation of it probably correlates very strongly with more maths.)

I was completely unaware of this pattern myself and have now managed to orchestrate two successive switches from a less to a more technical field, so it's absolutely not impossible, and I don't regret the path I've ended up taking for various reasons. But I reckon academically/career-wise I'd have made things a bit smoother for myself, and given myself more choices, if I'd started out with the most technical of the things that I love.

I am very much interested in working at the CEA. However, I am currently based in Copenhagen, and uprooting my spouse would be rather difficult and problematic. I am wondering if it would be at all possible to work remotely for the CEA. Please let me know. Thank you.