I have never been, nor do I intend to be overly picky about my lawn but while we were up north for a few growing seasons, my lawn was taken over by a moss which, this year, was a brownish rusty color and not firmly rooted to the ground. So I dug as much of the moss up as I could, planted tall fescue, and covered that with straw while it germinated. As a test, I did one quarter of my lawn a few weeks ago, and it grew into a rich dark green lawn, with grass that had a very hardy look about it. So I did another quarter of the yard today, which nearly finishes the project since parts of the lawn are taken up by raised gardens or trees. I might pick up another small bag and finish it up completely later this week. That was more work than I wanted to do though, but pretty much everything is more work than I want to do these days.