I never have voted much. There were a few seasons where I called in a few votes but certainly not regularly every week. I think the contestant I phoned the most votes in for was Apolo, the first season he was on.
Just in general, I've lost faith in shows where you call-in votes. I don't know that my votes count so much in the long run and it's just a pain in the butt to dial-in, wait to get through, then call again if you get more than one vote. I remember voting for Chris Daughtry on American Idol until I thought my finger might fall off and he still got eliminated that week so it seems like my votes won't change the outcome of the show.
I'd rather just watch the show and enjoy my favorites as long as they stick around.