Well, from the pictures I've seen of bloggers and celebs, and here on the forum, I think that BFs are not the easiest trend to get right, especially on curvier or more mature figures. While the slouch may look fine from the front, I think the back view is another matter. To me, it's a question of degree-- how much am I willing to give up just to look trendy or "have fun"..
The sexy/cute look of rolled and baggy jeans, to my eye, also seems to look more natural on a young-looking, slim-hipped woman who (theoretically) may have just dashed out from her boyfriend's apartment. When I tried a pair of BF jeans (hey, why not experiment because you never know), instead of sexy/cute, I looked like I had grabbed a pair of husband's old jeans and was ready to do some yard work. All that was lacking was an old straw hat. Functionable, maybe, but definitely not my most fashionable look.
I keep coming back to Angie's statement about grown-up looks. To me, BF jeans on many older women just don't do us any favors. That doesn't mean that I can't wear slouchy looks, but, maybe, boyfriends, in real life and in jeans, may not work out as well as we had hoped.