I actually have a few for me. My first and foremost for me was when I was 9 years old. My dad is the president of a fairly large freight forwarding company and at the time he leased a LR31 though it is now owned by his company. For my 9th birthday me, my mom, my dad, and my younger sister took off out of FRG for a hour long sight seeing trip out around Long Island. The F/O came back and I got to sit in the seat and take the controls. I would say that was the day I decided I wanted to be a commercial pilot.
Next on my list is the crash of TWA flight 800. Unfortuenately from my former house out east on Long Island where I grew up in Suffolk County I saw the initial explosion of that airplane from the hot tub on out dock in the back yard. I pointed it out to my dad and he did not think much about it untill we went inside after dark and I was getting ready for bed. I was glued to the telivision watching Channel 12news and ABC news for days after that event. This was prolific in that Shortly after this I was flying Delta Airlines flight 801 on Aug. 14th 1996. We depated LGA for TPA at about 6 P.M. and shortly into the climb there was a thud and than you could feel the plane sort of slow down and reduce it's climb rate. The accident report is shown here. http://www.ntsb.gov/ntsb/GenPDF.asp?id=NYC96IA168&rpt=fa . We dumped 15,000 lbs of jet a before landing at JFK on 13 Right. Defineately a memorable experince for me as a kid espesially since the flight numberf was 801.
I have too many to remark on but those stand out. How about everyone else?