A number of reasons. To put it simply, the EU is a sinking ship. Turkey joining in a few years is bound to spark up more referendums across Europe, with the likes of France, Germany and Italy. Immigration in general is a problem for us because it's uncontrolled. Once we get our borders back we can decide what quantity comes in, reducing the poorer quality of life that can currently be seen in parts of the UK. We also now have the ability to trade with the commonwealth countries. Canada, for example, couldn't trade with us because the EU wouldn't allow it.

Oh, and guess what? We'll now be a self-governing nation. No more un-elected bureaucrats telling us what to do. Democracy lives on.