I love all-white too - it's been my signature summer look forever - and Vanessa I love ivory too in the winter, even if it isn't very practical now that I live in a snowy climate. Anyway I think white pants look good on a variety of figure types, as long as the cut is right. I have a plus-size friend who always looks really good in white pants and a black or bright top. She's the curvy type, and the outfit so fits that philosophy of flaunting what makes you different.
Oh, and I usually buy white jeans, to avoid the pocket thing. But most high-quality twills won't show through. I did notice a problem with pants at Old Navy and Express this year, but I found some at Abercrombie and Hollister that were fine. (Can you tell the only mall in this town is pretty teen-oriented).