I remember seeing ANH at a drive-in at some point, don't remember seeing ESB in theaters at all, and remember seeing ROTJ opening weekend.
As far as getting too old for this? Well, my wife would certainly say so, but here I am anyway. BTW, I am a newbie here and I really dig it. I'm also a member to another SW board, but there appears to be more of an older, more mature crowd here and that's refreshing at times.