After deciding to try some of the oldies (before they got too old), I sampled my all-time favorite - HHV's Serendipity (and Legend, in a pinch).  They were 30pg/70/vg.  The TH ripped me and the taste was loaded with the "pg musty"...and weak, with minimal vapor.  'Just couldn't believe I'd ever loved 'em!  Since I want to clone 'em (and find out if they were old/stale, or if it was just the PG) I broke down last week and bought  fresh bottles (100 vg).  
Wow, the flavor just WAS NOT there (but the nasty-musty was gone and the vapor was plumin')...so I squirted a few drops of saline into the tank...Whump, 'der it is!  (why did I only get tiny bottles? :::smacking self in head::
Edit:  Oh yeah, we couldn't stand ANY of our old favorites.  Going max-vg & saline is where it's at for flavor!