Okay .
Let me share my answer ,as my BOSS has not reached till now
1.Fav train 12621/22,Rockfort ,Banglore mail 12657/58 and hold yr breadth 15127/28
2.Cleanest stn in IR network ,Kakinada town .next best is Indore junction out of 100 odd station where I hv travelled
3.slowest...
more... exp train Circar 17643/44
4.Dirtiest train in 12840&12842 .hardly any cleaning done at mas due to less TAT
And about PM at santragachi , very bad