I don't know about "interesting." But the most popular sex toys by far are vibrators. Anything that buzzes.

I have a little guy called the "dolphin" which is a cock ring vibrator.( or clit stimulator)....it is extremely effective, and has recieved rave reviews ;) !!

I had something similar, Think it was the Energizer bunny though. Didn't stand up to getting wet and quit...may have to get the dolphin. You're right, it was a popular toy.

Most interesting I've seen is probably the sybian f*cking machine.

Most interesting I've used is me :) okay, well, maybe my feeldoe.

The one that squicks me is the Real Doll.