Got a first class ticket from Kolkata to Gaya (why not, was cheap and it was my first time in India). The attendants were very kind, unusually so, and it was only after getting off the train that it finally clicked why one attendant kept saying with a loving smile, "gips, gips" -- he wanted a tip like I'd given one of the other attendants! (who was able to speak basic English and asked for a tip)
It was a nice journey, though the Gaya train station at 4AM, nothing prepares you for that, weaving through 500 homeless people sleeping on the ground; emerging from the mass of humanity to inhale the thick, dusty, diesel saturated air, on the way to Bodh Gaya, the Bodhi Tree, the birthplace of Buddha's awakening -- welcome to India :)