My parents were control freaks about the way I dressed. In addition, they were quite puritanical and old-fashioned. It was, well, stupid, since any kid of even average intelligence can figure out that all they have to do is get around the corner and make some small adjustments and break every rule in the book. And enjoy putting one over on their parents. I can also assure you that their insistence that all button-up shirts had to be buttoned up to my neck ensured that once I got around the corner, I unbuttoned it as far as it could go, to depths I would have NEVER chosen had I been left to my own devices. Ironically, she also was in total denial about the fact that I was much taller and curvier than she was, so she was forever buying me clothes that were too tight and too short (because I wasn't allowed to buy my own clothes, basically, until I left home), which showed a lot more of my figure than if she'd bought clothes that fit, thereby negating the whole "modesty" goal she was supposedly fixated on.
My mother, therefore, naturally had her own opinions on my wedding gown. Sadly for her, given her past history, I refused to allow her to go gown shopping with me. I know she was upset and hurt, but I also know that had she come along, WW3 would have happened.
So... based upon my experiences, I vowed not to be heavy handed with my children on their clothing. I did take my dd clothes shopping and I did give her my opinions, but I always encouraged her to find her own way. She is now nearly 20 and trusts me implicitly to buy her clothes for gifts because she knows I know her taste and respect it. She also takes me with her whenever she wants to get an outfit for an important occasion because she knows I get her taste and I will tell her the truth about the fit. I will note that my dd has an actual style in her clothing, unlike most girls in her age group who seem to live in sweats, tee-shirts and flip flops for every occasion.