For Dhauli: The timing is excellent. You can reach by 3 pm. Speed awesome and runs on time mostly. (Duronto fare 335).
For Samarsata: Competitor to Jnaneswari. A long SF train and that route is a rare thing to touch.
I tried to find my reason. But actually favourite becomes favourite sometimes without reason- that's the trick of mind- we can't find the answer. So just love what the heart says.