Fallout 3 had more repetitive quests about finding something and giving it to the guy, over and over again which was fun.
Vegas has millions and millions of quests, most of which are interesting and fun to do, but i kinda feel that many rewards you get in the quests are not worth it. Hell i could make more money of raiding a few Viper and Jackal camps, then doing most of the quests in the south side of the Mojave.
Quest rewards have almost
always been inferior to what you can get from looting the dead, so it's not exactly fair to pan quests based on lackluster rewards. That does depend on the quest to a certain extent, though, as the reward should generally be commensurate with the difficulty/length/both of the quest. In addition, if quest rewards were always better than looting there wouldn't be much incentive
to loot, which is just as bad.
To answer the OP's question: New Vegas has many more quests than FO3, albeit the same general types thereof, along with more ways to complete a given quest. There is also no one 'superior' choice in how to complete a given quest, save as dictated by the type of character one is currently playing.