For some reason, people who vote on www.startrek.com
love Voyager. I think among casual fans "Voyager" is very popular because its definitely the kind of show you can dip into easily and get your fair share of boobs and action of the week.
Frankly the results of those polls are often a total joke, apparently the season finale of "Voyager" gave people the most closure. LOL WUT, way to not use your brains voters ;-)