Made this update and share my adlists.list and whitelist files with the gusys.
Feel free to replace (or merge?) your /etc/pihole/whitelist and /etc/pihole/adlists.list files with these. The adlists.list file changes rarely, but the whitelist is obviously more fluid.
90% of the whitelist file comes from the Commonly Whitelisted Domains wiki. The other 10% comes from me tinkering with shit.
The adlists.list file is a combination (currently) of the default lists and wally3k's custom lists. I only use his 'ticked' lists, which he says should be free of any false positives, but that isn't always the case (thus the extensive whitelist).