I used to feel much the same way as you, chocoluvva. I felt that as bad as the democratic deficit in Scotland was (the fact that every other electoral cycle we - that's the vast majority of Scottish voters, Flyte, not you as an individual - get a government we soundly rejected at the ballot box) it was, perhaps, a (heavy) price worth paying in order to prop up a slightly more leftist, or just more moderate party in the UK.
But then I looked at more closely at election results, which I'm sure you've all gone over half a dozen times in these threads. The 'impact' of Scottish votes on UK elections is obvious - there's no impact at all. Since 1945 the outcome of general elections has only been marginally influenced by the Scottish votership 3 or possibly four times - all in the cases of hung parliaments/minority governments. Whenever the largest voting bloc in the Union, England, has voted decisively for a Labour or Conservative government, the UK has got one. It's a simple numbers game. The Labour party doesn't need Scottish votes to prop it up. Couple this with an outmoded first past the post system and an electoral strategy which sees both major parties focus their campaigning and policy direction on a tiny number of swing voters in a tiny number of constituencies, and we have seen UK politics drift ever rightwards.
The idea that Scottish MPs have a moderating influence, on international or domestic affairs, is a nice one, but there's no evidence of this. Even while in government and not opposition, Scottish MPs have helped to introduce disastrous neoliberal policies, like 9K tuition fees in England, safe in the knowledge that it doesn't affect their constituents. At the same time, I have heard Scottish Labour MPs argue against the interests of their very own constituents when it comes to postindependence arrangements. There's no attempt to exert any moderating influence at all, they just take the votes of their constituents entirely for granted, and concentrate on playing Westminster politics, lazer-focused on a tiny number of swing voters in England.
As a voter in this referendum, I can, for once, choose to use my vote to secure greater representation within a Scottish polity, ensure that my vote is counted as one in 4.1 million, and ensure that Scotland always gets a government that the majority of people in Scotland have voted for. Or, I can choose to let the opportunity of greater representation go. I can choose for the outcomes of elections to be decided by almost 48 million, and realistically to be decided by a tiny number of swing voters in marginal seats, which I have no chance of ever influencing, and simply hope, against hope, that I don't end up being subjected to yet more rightwing policies (from either party).
Basically I can use this vote to take responsibility for my democratic representation, or I can give it away.