I'd go with Superboy. Drastically declined when Lobdell left and DeFalco took over. In fairness to DeFalco if the Jon Kent stuff still was going to come into play had Lobdell stayed it still would have had its problems, but still virtually every aspect be it plot and tone nosedived when DeFalco came aboard. It went from this intriguing young technopunk feel to generic teen angst over night.