Here's something I thought I would start since I haven't seen a thread on this.
What's your favorite subway memories you had whether you're railfanning or just traveling?
My few favorites so far I can think
R38 
Train in 2000
4 Car R32 sets on the 
on weekends
R40 Slant via West End
Diamond 
the 
Train to Coney Island
R32 
Train
Riding the Redbirds on the 
in 1998
The first day when the went via West End in 2004
The Orange
R40 Slant Train in 2006-2007 during certain weekends when they had the to 2nd Avenue G.O with the Slants running in the northern end section
And of course, riding the whole northbound Train via local the way for the first time which was last year.
Now share your thoughts