My brain blowout was almost five years ago. I do go to the movies now and then but it sometimes borders on sensory overload for me so I have to be careful. That has improved with time, but any time spent with lots of people, noise, lights etc wipe me out even with preemptive naps. I've had to start factoring that in as a given. Also, since I have the left visual deficit, even with my prism glasses I'm always missing part of the movie screen so it's not as enjoyable as it used to be. Either I miss the left (if I am watching the middle and can see the right in peripheral) or if I try to be preemptive and watch the left, I miss the far right and some of the middle. I usually have to watch a movie 2 or 3 times to get the whole thing and if the words on the screen move around to different spots, I miss them.
As far as the sensory overload - I recently attended a good friend's birthday party at a local hotel/casino. We went early so spent most of the day in the casino before the party, so a nearly full day of flashing lights, lots of sound, smells like cigarettes, cigars, perfume, cologne and food, and crowds. THEN was the party - catered with tons of people I hadn't seen in a while - all who wanted to talk to me, catch up, ask me questions, expected answers etc. I got overwhelmed, dizzy and nearly passed out. Woke up in the ER unable to speak. I was in the hospital overnight and by the next day or so I slowly returned to normal. (The MRI and CT all showed no change from my previous ones)
But stress and overloads can and do cause my brain to get pissy and shut me down. Different symptoms I've experienced are texting and typing backwards, bad vertigo, being unable to think of common words, being confused bout how to get home (even from the mailbox about a block away) and most recently not being able to speak. So far they have all been reversible once I stopped whatever stress or overload that triggered them, but I try my best not to tempt fate.
I have flown by plane since my brain blowout. It usually gives me a headache along the incision lines of my craniotomy and makes it feel like the pressure is squeezing my skull like an egg. But I CAN fly. Although I end up feeling like I have a hangover for several hours (sometimes several days) afterwards.
I haven't gone to high mountain elevations (on land) since my stroke so I can't answer that, but I imagine it would be similar to my reaction when flying. I do notice that when the barometric pressure is high that I feel that "head being squeezed like an egg" sensation" and the aching along the incision lines increases as well as the fatigue. Like you mentioned my energy is MUCH less than before and I can no longer multi task - which sucks!!
Naps are now a necessity rather than a luxury. I used to be able to sit down and write for 8-12 hours when on a tight deadline (I'm a writer) but now a good writing day for me involves at least 3 20-30 minute naps or more.
The other BIG issue that I have, oddly enough, is going to the dentist. Any time they are drilling or even cleaning my teeth with that sonic drill it feels like it echoes inside my skull and it is EXTREMELY uncomfortable bordering on painful. I try to take earbuds to play music, but even with that it can get to a painful level. Luckily my dentist is awesome and they just don't use the sonic polisher to clean my teeth, but there's not much they can do about drilling if I need it for something.
Crowds are also an issue because people think I will see them on my left and get out of their way. However, I CAN'T see them most of the time because of all the other "stuff" going on in crowds, and end up running into them. My family and friends have learned in these situations to take up a position on my left side, and even at restaurants I sit with my left side toward the wall or whoever I'm dining with so I don't end up not noticing waiters, etc trying to get my attention or handing me drinks.
It has been an adjustment but I'm back to doing most things. I got my driving rights back since I can see flickers father out on my left when I'm paying attention to them, but since my vision changes quickly (I think that's more about getting older than the rupture...lol!) and prism lenses are expensive, I've stopped driving and just let my family and friends drive me. However, I am back to writing novels and can do most things, as long as I don't overdo and I listen to my brain. If I don't, it shuts me down anyway, so I've learned to listen. It's like having a cranky toddler in my head that I can't swat on the butt when it's being obnoxious :)
I don't get seizures but since they didn't want to do a lobectomy and leave me with more deficits I have a LOT of dead brain tissue hanging out up there so I'm at a higher risk for seizures which means I'll be on anti-seizure meds for the rest of my life. I'm also on meds for panic attacks and hyper mania. But with those meds and patience from my family and from myself I'm making it work.
But...I can feed myself, wipe myself, recognize my family and can still do what I love, so life is good :) It's just an adjustment, and even after nearly 5 years I do still miss my "old self" at times.
You're definitely not alone!!