OMG! Me too! I once went through a phase where I watched it everyday for a month. It's like, the more you watch it, the funnier it gets. It had so many great one liners.
"Yeah, they're called hicks Rita."
Plus all the meaning behind it is really cool, blah, blah, blah.
My local cinema had a showing this Groundhogs Day and I was so bummed I couldn't go.