What are the rules re: lace dresses?

[CeliaFate]

I always imagine them to be a bit scratchy and uncomfortable and a bit cheap looking. Is that the case?
What colour is best?
Can I get away with it at 41 or will I look like Miss Havisham?
Length? Sleeves? Style?
Thoughts anyone?

Thanks mummymccar! If I get funny looks, I'll know I've committed a crime against fashion

If you get funny looks just have a look at what they're wearing, I guarantee it won't be as good!