100% VG will definitely give the most amount of vapor. On the down side, throat hit will be somewhat diminished as will flavor. It may also not wick well in some cartos and may lead to premature clogging of cartos That being said, you did not do wrong. If it works for you, go with it. There are many people vaping 100% VG. Others like a mixture of PG and VG to get the best of both PG and VG.