I've been using electric toothbrush for years, and couldn't be more content with it. Smaller, easier, more effective.
The first few times I thought it really tickled, but I got used it quickly. I'd hate to not have one. I also like the timer so I have an idea of when I should be about done. I don't follow it slavicly of course, it's just a good indicator.
Integrating it slowly into your daily hygiene seems like a good idea though if it causes you problems. Slow and easy is usually the best way to deal with such things.