Surprised that no one has mentioned LoLo from Rook's Media and Tickle Abuse.
Have to agree with those that said Summer & Viviana from Tickling Paradise. Viviana seemed ALOT more ticklish 8 years ago than she is now. Of course Summer won The Contest which was an epic TP video. Both are absolute dream ticklees!
Agree with so many. One that hasn't been mentioned is Joey from Tickle Abuse.
Lenka from Czech Tickling, or Monica from UK Tickling.