This is not me starting a pissing contest, I'm genuinely amazed you "finished" NEW VEGAS so quickly.
Well since it doesn't have as many dungeons as FO3 (which is a good thing and a little bit of a bad thing) and enemies have fixed locations (Which is a good thing and a little bit of a bad thing) I don't have much to do at lvl 30 really.
Any place on the southern half of the map is low-level and I have no reason to go there anymore since the loot will be crap and enemies won't be a challenge.
20% of the upper half of the map is New Vegas, 10% is invisible walls and 20% is fully explorable.
It doesn't leave much room to explore.
If I can't explore around enemies which are a challenge then I just do quests.
And quests do run out at some point.
So while I like that New Vegas is more of an RPG than FO3 was I don't think that a playthrough can last 90 hours like my FO3 playthroughs did.
Which isn't a bad thing really, it's not a contest of which game can give me the most playtime.
Vegas is more limited when it comes to that part.
And the game also becomes more predictable with each playthrough.
I know for example that to the east of Goodsprings there is the Coyote Den and Quarry and Jacobstown.
While to the south-east there is NCRCF and powder ganger spawns.
To the north is cazadors and giant radscorpions.
Directly to the south are young gecko's and gecko hunters.
So while it's a more realistic game world it do become more and more predictable with each playthrough.