Ambush Bug is, and will always will be, hilarious. It has always irked me that Deadpool was always more popular despite having ripped off Ambush's whole shtick.
Also, how great was that Busiek/Perez run of Avengers? Truly amazing stuff from start to finish. I had also wondered just what to start my kid reading comics with. I have some Silver Age stuff but it never occurred to me to start reading that stuff to him. Might have to start doing that.