I love fallout to bits, i brought fallout 3, didnt like it.. (Im a PS3 User)
But, it grew on me, my save has over 400 hours of play, i 100% did everything possible in the entire game, my save is 15mb (Crashes when loaded..)
But, at least i know i completed the game fully! (Including DLC/GOTY.. Brought both...)
Now, the bugs DIDNT bother me, as im a patient guy, well the fact that when my save got over 10mb it froze up pissed me off alot..
Now, after hearing a few months back, that Fallout: NV's story would actually end, it let me to wonder.. Why make the same mistake twice ?
They did this with FO3, and so many people complained they patched it (DLC) so you could continue your exploration! (All smiles)
I just HOPE and PRAY they do this for new vegas, because, apparently too 100% the game, you need to play it 3 and a half times ?
Thats [censored].. I want to 100% everything on one save.. Yeah ill play it more than once, like fallout 3, but i dont want to put hours into different saves >.<
Also, this game apparently is VERY BUGGY...Im from the UK so i wont get it until friday, Bethesda said there working on a patch (Im sure they did that for FO3..?)
But yeah..
Another thing that pissed me off, is that [censored] with the DLC exclusivity...Im not even going to go there.
Who thinks they should make DLC to continue the story after the main quests are finished ?
I surely do..!

http://www.eurogamer.net/articles/2010-08-23-why-fallout-new-vegas-has-to-end-article

Already pointed out.

EDIT: As for DLC exclusivity, how is ANYONE surprised? Microsoft has exclusive DLC for just about everything that runs on the 360. There's added advantage that the 360 is curiously more stable than the PS3....

You wouldn't be able to do 100% on one save if you tried. There's about four different paths to take in the main quest, and a lot of things depend on the choices you've made. It's not straight-forward like Fallout 3.