Feeling a 152 "leap" off the runway on your first solo (because of the missing instructor weight) and realize it's ALL up to YOU now!
Circling a small town water tower on a hazy summer day trying to find out where the HE** you are on a solo cross-country- and finding out the town isn't on the chart!
Raising the flaps to zero all at once and marveling at your new sink rate on a go-around!
(No ack-ack,SAM's,AB departures, but it's still memorable!)