Insincerity. Don't force it. A genuine reaction is far more pleasing than one exaggerated for the camera. Some might disagree with me on this, but when it comes to tickling, don't try too hard to be "sexy". Be you, do what you like, and have fun with it. That's not to say it shouldn't be torturous at times, but if you go to extremes, you'll only attract people at the extremes, and there are far fewer there. Don't be afraid to talk and be yourself. I think you'll find a much more loyal and broad following if you allow your fans to get a bit emotionally involved with you.
Apart from that, please be safe. Don't divulge your location. Don't answer creepy fan mail. Don't listen to the people who will try to view you as an object, and many will. Finally, do this for you, because you want to. The moment that's no longer the case, stop.
Good luck.