lol whoa there sonny-Jim. Why go from 100% PG to 100% VG? It's like night and day. Get a blend of PG and VG. That's my advice. Actually, get different blends to see what you like. Honestly you just have to spend money to find out what you like.
With 100% VG there will be tons of vapor. I find it too thick personally. Makes me gag and even makes my voice sound like James Earl Jones. This is especially true when it hasn't been thinned.