About the wedding, or beforehand?
I had a bride who threw a major temper tantrum when she saw her flowers on the morning of the wedding. They weren't exactly the way she had imagined them, so she screamed and cried and said she wasn't going to the church or getting married with such horrible flowers. Then she locked herself in her room.
The problem was easily fixed with a bit of florists wire, but that was one stressed lady.
I had another one who did something similar because she didn't like the way her hair had been done (it had been done exactly as she specified). We had to redo the entire hairstyle before she was happy. I spent the time thinking 'Couldn't you have told the hairdresser you had changed your mind in the first place?'
Then there was the bride who specified everything, but everything, about the bridesmaids' costumes, down to the colours and style of the make-up they wore and what sort of underwear they had to have.
Another bride, a rather large lady, decided that her wedding dress fit so snugly she didn't need the corset type underwear that compressed her torso so that we could get the dress doing up around her in the first place.
I once spent my time in the hairdressers sewing a wedding veil on to a comb so it could be placed in the bride's hair, then taking it off when the bride decided she didn't want her hair like that, then sewing it on again when the bride changed her mind, then taking it off ... you get the picture. At the end of it all, her hair wasn't where I was wanting to put the comb.
Then there was the bride who told us to lose weight for her wedding, the one that said we all had to grow our hair, the one that had to have us all in different heels so we were exactly the same height, the one that had to have us all wearing a colour that did not exist in bridesmaid dresses (so we spent much of our time searching for this mythical colour in dresses), the one that handed all the work for the wedding over to us and then yelled and screamed when we couldn't find what she wanted in the shops/tied bows in slightly different sizes on the order of service/put the decorations she had specified on the bonbonerie (she'd changed her mind, but hadn't bothered to tell us), etc and so forth.
Then there are the ones that use you as a chauffeur service (get up at 5am the next morning to drive people I don't know to the airport that's over an hour away? Sure, no problems); the ones that get cold feet and ring you twenty times in three days to say why they can't get married, and then accuse you of being unsupportive when you agree with them; the ones that ignore your food allergies because 'that's what I want for the reception'; the ones that use you as an unpaid babysitter for the kids during the cocktail-and-canapés reception; etc etc etc.
In my experience, bridesmaid dresses are always hideous and not flattering. The best man/usher is always someone you'd immigrate to avoid. They can never dance, and they always make horrible, innuendo-laden jokes.
I've spent a lot of time being a bridesmaid. Most brides are great, but some of them stress out over trivial things, and bridezilla does exist in various incarnations.
Hope these stories were what you wanted.