VG does have some flavor. A slightly musty flavor to me. I have tried 3 brands so far. I got this last from Amazon. Seems to have the least flavor.
http://www.amazon.com/Vegetable-Glycerine-Kosher-99-7%-Pure/dp/B0013PWHOI/ref=sr_1_7?ie=UTF8&qid=1434548995&sr=8-7&keywords=VG
I use this same VG for my ejuice and have found it to be equal or superior to anything else I've tried. Get the big bottle!
-Treeburner