Saturday - Have you ridden????

Commuter trains: Sacramento RT Metro, SF Bay Area BART, MUNI LRVs and historic streetcar lines, Chicago Metra (diesel) and El trains.
Amtrak: Capitol Corridor trains, multiple California Zephyr trips, Coast Starlight
Tourist lines: California State Railroad Museum "Sacramento Southern," Yolo Short Line "River Train," multiple rides on most of the equipment at the Western Railway Museum (electric interurbans and streetcars.)
 
I have rode the following:

Cuyahoga Valley Scenic Railroad (Tourist and volunteer)
Hocking Valley Railway (Tourist)
Cass Scenic Railway (Tourist)
East Broad Top (Tourist)
Tweetsie Railroad (Tourist)
Oil Creek and Titusville (Tourist)
 
I suppose I should count Godfrey Humann's 2-foot-gauge tourist railroad too: it's only about a mile long, but is pulled by a genuine narrow-gauge steam locomotive!