I loved Sierra games. I had a windows 95 setup off to the side of my main computer for years just for the Sierra Baseball and Football games. I wish the NFL had made the opening for the Madden series as well as a more simulation style.
I love Madden. When I feel like it I'll play for hours, but the Sierra games I'd play nearly every day. Madden, a few times a month.
Sierra had a great play builder- something lacking in Madden even when they had the feature.