My character was level 30 when she finally entered the Strip, and had covered 99% of in-game locations, not to mention become Idolized with all factions save the Powder Rangers and the Legion.
Now finally following the main quest (though currently it seems to be come to a standstill with the bug I mentioned before, I'll try to use the console to re-input the platinum chip), I've been revisiting areas four times already, which gets very boring. It seems one is supposed to get to Vegas and the Strip as soon as possible, but with so many empty triangles around this is simply not possible for me.
As it is now, I would've been content if the game had ended after nailing Benny, since I certainly had enough fun before that. After getting her revenge, I don't see why my Courier should care about the squabbles between the NCR, Legion and Mr House... beyond the fact that the Legion is very evil and would most probably use her as breeding cow until her death if they got their hands on her.