Not to sound too "preachy" or whatever, but I love getting random roommates at ADPi events. That's when I've made some dear friends from across the country. Otherwise, I just stay with sisters in my province or chapter. It's a great way to get ideas from other people and it really is neat to see that ADPi's are ADPi's, no matter where you're from. I've felt comfortable with all my roomies in the past and still keep in touch with many of them.
That being said, yes, it can take you out of your comfort zone for a bit! And if you have any strong preferences you can note them on your registration form.
I can't wait for VLS!