A very incomplete list of trains that I've taken.
New York metro area
- Metro-North Railroad: Harlem & New Haven Lines (missing Hudson, Pascack Valley, and Port Jervis)
- New York City Subway: A B C D E F G L N Q R W 1 2 3 5 6 7 S (missing J Z 4)
- NJ Transit
Missing: AirTrain JFK, Long Island Rail Road, Staten Island Railway.
San Francisco Bay Area
- Roaring Camp Railroad
- SFO AirTrain
- VTA Light Rail
Missing: Altamont Corridor Express, Sonoma–Marin Area Rail Transit
Washington metro area
- Washington Metro