Poorabiya Express: कोसी की शान से दिल्ली महान तक - Md Rashid Alam

Talking about preference, the patronage tells you all....
AC Express has been hitting atleast 85% average Patronage every run in each direction (even in lean season while running with REGRET in all other runs including mid peak season)

BCT NDLS premium as u say people prefer it has been running half full for the past few runs....
...
more...

In last run too When tickets in 12952 and 12954 were available, people had booked tickets in 22110 AC Express from NZM to LTT and they could have boarded any of the Rajdhanis if needed ... WHICH CLEARLY STATES the likes for this train despite being maintaining punctuality.....

Just give it a Triweekly run with a Rajdhani tag and you will see for yourself, the demand...