I stopped watching shortly after Rob Morrow left. The writing was already beginning to decline by then. For me it was when Larry Gelbart left and the comedy took a backseat to Alan Alda's ego. I'd say that the first two seasons of TWD more than held up to the quality of Lost. The first season was great. The second season was very good but as soon as they solved Laura Palmer's murder it ran off the rails. The third season was Lynch having his cake and eating it too with no one to tell him no. Some of the episodes were riveting others not so much. The Dougie crap went on far too long. I did love seeing Miguel Ferrer in his last role and Duchovny should have been around for a bit more time.