I used to have a Giant hybrid that had the grip-shifters. It was really weird at first, and I was really afraid that I would constantly be bumping it and messing with the gearing. Have you been out on your new bike more than a couple times? I think the shifters are something that you would probably get used to over time...at least that is what happened in my case.
2007 Trek 5000
2009 Jamis Coda
1972 Schwinn Suburban
"I rejoice every time I see a woman ride by on a bike. It gives her a feeling of self-reliance and independence the moment she takes her seat; and away she goes, the picture of untrammelled womanhood."
Susan B. Anthony, 1896