I had chicken pox twice--once in second grade, when it was a fun little adventure. Five pox on my body, a little itchy, a week or so sitting out on a blanket in the shade with my brother, playing board games. Super-fun time!
When I was nineteen and home from college for the summer, I picked it up again, because that first case had been so mild and I didn't get a lifelong immunity. Let me tell you, it was the sickest I have ever been in my life. I had pox all over my body. On every patch of visible skin, down in my throat, in my ears and ON MY EYEBALLS. Grossest thing ever. I couldn't wear contact lenses, obviously, and my glands behind my ears were so swollen, I couldn't wear glasses, either. I spent two weeks lying on the couch staring up at the ceiling, desperately itchy and feverish and not wanting to even move because I was so miserable. It was a BAD time. I infected my brother, also home from college that summer, and he had a similarly awful experience. If you aren't immune and are thinking about being exposed, make sure you have a good support system who can step in if you are as sick as I was.