Do what you want. I'm over the French and will probably do pink with a bit of a sparkle. I may even go for something a little bolder. I LOVE bright colors and think it'll be fun. My engagement pics have a bright ish pink.
@Future Mrs. L, do you know what that sparkly nail polish in the second photo is?
For the wedding, I will probably do a natural-nail mani with OPI "Princesses Rule." I don't think French is "out," but I do know that natural-nail is en vogue at the moment, whereas fake nails, even short French ones, *are* kind of "out."
I agree with not going too trendy; it may look dated when you look back at your photos. I'll be doing a soft creamy color that doesn't stand out too much. I don't always have my fingernails painted, so nothing too obvious.
As for my toes, these are always painted a fun color... I may go a bit flashy by using one of our wedding colors (dark purple). But not 100% sure yet.