Well, i'm all for confort. If you're not confortable the days gonna draaaaaaaaag.

I'm in the middle of planning my wedding for Oct and I've told my bridesmaid to pick her own dress out, so long as it's a dark purple colour.

Perhaps when you get the fitting you can ask if her if your dress can be made a little longer to cover your knees? And get little spaghetti straps? I've been to weddings where the bridesmaids have worn all the same colour but each dress has been a different style to suit different figures/personalities and it is really affective.

LimeSlice
But you simply dont have a choice hun. It is her day and if she wants you to wear a cheerleading outfit and do flick flacks down the isle, then you do. - that is what you sign up for when you agreed to be in her wedding. What you want doesnt count, nor should it. It is her day, her day to remember for the rest of her life, her day to have what she wants, whether you think you look good in it or not.
Yes, but then on the other hand I'm sure her friend doesn't want her in photos looking awkward and uncomfortable either... I know I would rather my friend look happy in a dress she likes wearing and have some fun with me on the day rather than being worried and uncomfortable.