Shingles isn't fun.
Ask a few people about shingles
and they'll tell you it can range from annoying to really painful with symptoms that last months after the rash
is gone (postherptic neuralgia
There's no great predictor if you'll get a mild or severe case. And yes, you can have it more than once in a lifetime - i've seen people on their 2nd or 3rd episode. The cost isn't trivial, but shingles isn't either.