Well if I had my pick it would be /f in a fictional setting. It would start off with a girl (attractive but not beautiful, so you know she's not just some hired model) going to a salon and getting a massage and a pedicure. This serves to dual purpose of setting up the story and letting you know the real life girl's skin is currently very sensitive. Then she'd be attacked by a guy and girl working there and tickle wrestled into some bondage equipment (no cheesy dialogue, from this point its all genuine.) After that she'd be tickled and have several forced orgasms to let you know she's getting progressively more ticklish. The tickling itself would be all over her body with pauses every five minutes at most. Ideally the ticklers themselves would be members of this forum so you can tell they know what they're doing and enjoy every minute of it. I'm tired of videos now (realtickling and last laugh to name a couple) who have supermodel ticklers with absolutely no idea what they're doing. Then, of course, you know the lee is faking.
I've also always wanted to see a video where a boyfriend and girlfriend are tickled together and forced to do things to each other by their tormenter(s) to avoid further tickle torture. That'd be awesome.