They want to make their own laws and not be governed by a party very few of them voted for. Forget trade and balance sheets. They want their freedom. A bit like another nation is can think of...
Scotland does make it's own laws, it just doesn't have to be financially responsible for them.
Scotland is essentially the only part of the UK to not be effected by austerity measures. The Welsh healthcare system barely functions, Northern Ireland doesn't have a government, and England has absolutely zero national representation. The only representation England will now have is autonomous City Mayors. Scotland gets higher investment in social policies, a fully functioning and large Scottish Parliament, a heavily over represented First Minister and doesn't have to even consider the fact they run a huge budget deficit.
I sincerely hope, 100%, and have hoped for the past 6 years that Scotland leaves the United Kingdom. I think it will be the best thing to happen to England and Wales in years. The billions of pounds invested over Hadrians wall is desperately needed in Wales and Northern England. Scotland waste it, they haven't invested intelligently in years.
And it will be another independent country in Europe, that is so heavily reliant on England (and Wales) that we will have further influence on the continent.