My favorite is New Jersey Transit because thats the only one I have really seen. My favorite LINE is the ac line.
I too would say New Jersey Transit due to its commitment to speed of operation; ability to always run on schedule; impecable maintenance & cleanliness of equipment; friendly, cheerful & well trained staff; and frequency of service on all lines. An all around class operation!
Before you brand me a total nut please consider the following from the Webster's On-line dictionary: IRONIC implies an attempt to be amusing or provocative by saying usually the opposite of what is meant