What should I do with the Hill in my front yard?

I have a hill along the road that spans 150 feet long and it's 18 feet wide. It's pretty steep and I HATE mowing it. You can sit on the rider to cut the grass but you REALLY have to lean to one side or you could roll over. I am thinking of planting cattails in the ditch since it's REALLY wet all the time. I was also thinking of working my way out from the driveway and taking my time planting different things as I go. Like certain wildflowers that come back every year Etc. Any other ideas????