Are there any lines that you draw that cannot be crossed? If not, then all is game. However, it may be that you haven’t come up with what’s really important to you. It may be that you’re looking to see what excites you, after all, they do say that opposites attract. Maybe you need someone different from you to complement yourself and that two of the same wouldn’t be best.
Of course, this is your preference, but it’s best to be clear on reasonable expectations so that you can maintain a sense of what you believe will make you happy.