Finishing Ultima IV
Finishing Ultima V
Seeing Defender of the Crown for the first time on an A 1000.
Seeing Bard's Tale in a journal, a review of some gaming fair... and then playing it and finishing it

Playing and finishing the SSI AD&D series... (not that Hillsfar stuff, the Champions of Krynn and the Forgotten Realms series!!)
Have fun,
McTrinsic