I never got it as a kid - the other kids at school would get it and I didn't. Probably because I was unsociable and didn't hang out with them! ;D
I then got it at age 21. I felt ill in the cafeteria at uni, blacked out, had to sit down quickly on the floor, and some girl helped me up to my room. I went for a bath and I discovered blisters all over my tummy! I knew it was chicken pox because I knew some guy in the halls of residence had it. I went to the doc, and the doc solemnly told me all the possible complications of getting chicken pox as an adult - gosh, I was convinced my prognosis was very poor from the comprehensive list he gave! But I was fine - I was ill for 2 weeks, and had a lot of spots, which were very uncomfortable, and felt faint quite a bit, but then I got better.
Then, quite randomly, three years later I found a chicken pox spot on my hip. Just one spot. I wondered if I was getting shingles, and I went to the doc and showed him my spot. He said it was a chicken pox spot. He had no idea why it was there, but there is was, and then it went away after a while.