Since 2015-02-15, I've logged 3572 rides on SkyTrain vehicles.

As of today, I've ridden all 150 of the Mark I vehicles, all 260 of the first-gen and 348 of the second-gen Mark II vehicles, and 31/60 of the Mark III vehicles.

My most frequent ride is apparently 213, followed by 233 (which is my favourite first-gen Mark II train because of the LED headlights).