Well, I picked up the mixing kit today with Apple Pie, Vanilla Ice and Strawberry Tart (as well as a Red Label Menthol concentrate). I've mixed up a ml of each with PG only, and I've got to say..... I need some VG. My local Tesco didn't have any (despite a price label :/), so I'm going to fly out to the other one after tea.
Apple Pie tastes great, with great throat hit but not enough vapour (this is my reason for VG!)
Vanilla Ice tastes a little....meh at the minute. The flavour is very muted, and not nearly as sweet as I was expecting. From reading up, this is another that really needs VG.
I haven't tried the Strawberry or Menthol yet, but here's hoping they're half decent.
Green Cow concentrate was out, and in the spur of the moment, I completly forgot the recommendations you guys gave :/