Committing to an EC?

So I have been in Leadership (Student Body) for 3 years currently, and I have lost my taste for it. As a junior, I was thinking about dropping it for a new elective in senior year, one I could enjoy more. I have heard from many that committing to an EC for all four years shows up well on College Applications because you have all 4 years… Is it worth just finishing the one year or should I branch into other things? Based on your application, do you think it can sway an opinion or look good on a college application?