Caroline, I like that idea too! Like I said it is a gradual slope, I don't think it will affect water run off in a negative way. I don't really notice when I am out there working as far as being hard on my feet. I do have an area in the front of the yard along the highway that drops off steeply to a culvert ditch and I planted some daffodil bulbs there earlier in the year and I really felt that on my legs. It was a hard area to stand up along. That is why I thought daffs would do well there though, just plant and forget!
You can see the degree of the slope in the picture if you look at the bottom of the house where it meets the soil and on the left side of the pic the foundation sits almost on the ground level and at the other end of the house there is a gap there. I wonder about just leveling that one 4ft strip along the house where the hostas are going? I think it is visually more noticeable where I can see the foundation changing?