some of my favourites included the Messmermatron, Jack and Lincolns Repeater (well especially Lincolns Repeater)

does the game end like Fallout 3? (pre Broken Steel)

what do snowglobes do ?

do bobble heads return?

how many vaults exist in New Vegas? and is there anything awesome in them like Vault 108 of the Capital Wasteland ?
where is the robot you can ?

are their any nukes you can detonate ?

whats replaced the enclave ?

can you meet any of the radio DJ people in the game ?

how do you upgrade a weapon what do i need to do it ?

what can weapons be upgraded to have and what cant they be upgraded to have (I'm going to assume no pistols with flamer attachments)

can i turn off vat kill cams when not useing vats ? (random slow mo body/head shot out side of vats gets annoying)

Answers in bold.