My fav MG train journey Meenakshi express .Pink city ,Cholan ,Rockfort exp and BG lot of trains
But King Rajdhani 12951/52 and of course 12622 favourite one
Slowest express train ,travelled Toofan express 13007/8,( now cancelled )
Kashi exp 15017/18 ( once took 9 hours from BSB to Allhahabad )and 19019/20 stops on all station during daytime ***