(I voted "Yes" at 8am.) If I didn't have any views on which system is better, I would have been pursuaded to vote Yes by the "Vote No" adverts, such as http://i.imgur.com/yCyLv.jpg Admitedly, the campaign for "Vote Yes" has frankly been terrible as well, but in a way that makes you think they don't have a clue about marketing, rather than a way that makes you want to strangle whoever came up with the adverts.
This morning I ran into a No campaigner leafleting at Camden Tube station. When he tried handing me a leaflet, I informed him that I had just voted Yes. As I walked away, he shouted that I must be "LibDem scum".
That actually comes as a bit of a suprise to me, in my head (and in my limited experiences), the kind of person who volunteers to promote a political campaign in the UK isn't normally the type of person who would get particularly aggressive. Admitedly my personal experiences are based in a fairly middle class area of Oxford, so perhaps not representative.