The problem between you will be the fundamental differences in what each of you, as individuals, need out of a friendship. There will be a disparity between how you see one another and what both of you are actually like as human beings. Think of it as viewing each other and the friendship through your own filter -- something that you'll both do naturally.
Whatever your expectations for the friendship might be, they may not be met. At best, you'll end up spending a lot of time talking things out, trying to help your friend understand your point of view and your needs, and vice versa. It is important, of course, to be heard and understood in any relationship and to have your needs met; but sometimes it's best to take a step back and admit to yourself that you're simply two different people with two different opinions on what a friendship should be like. That will be the case here.