I've only had the aura once, it was quite frightening at the time because I didn't know what it was.
Interestingly for the last couple of years I've only had low-grade migraines, the pain is much reduced and it's a day or two of being headachy rather than eight hours lying in the dark wishing for death. The reason that this is interesting is that for the last two years I've been on mirtazapine for my insomnia, it turns out that there is some evidence for its use as a prophylactic against recurrent headaches and migraine. Perhaps it's helping my migraines too.