Agreed. I had a little over 600 hours into FO3 with DLC's. Needless to say I was obsessed with the game, quests, and mainly exploration. I believe I completed 5 or 6 different characters. I have played Vegas with three different characters, with DLC, covered just about every variation of quest endings, discovered every small corner of the map, and I am pretty bored with it after about 120 hours. Not even close as far as depth of exploration, unique weapons and armor to hunt down, and overall replayability more than a few times IMO.
1. If you only did 3 characters, then you didnt covered all the endings, http://fallout.wikia.com/wiki/Fallout:_New_Vegas_endings, The game have more endings then FO3
2. Two words,http://fallout.wikia.com/wiki/Remnants_power_armor you might want use it,
3.Weapons are supposed to be scarce, so this doesnt bother me a little