I played Fallout 3 and Fallout New Vegas.
In my opinion Fallout New Vegas was more fun, but also contained some more bugs, but the most are fixed by patches.
The Ultimate Edition of Fallout New Vegas contains ALL DLCs and is UNCUT, it is a must buy!
The Quests are nice, the world design is good too, there many creatures, many weapons.
What can i say about Fallout New Vegas?
It does contain some bugs, but it is really fun to play, many diffrent Quests and not just "kill X"!
There was a quest, where i feel like Sherlock Holmes.
If you miss playing this game, you really should buy it, it has a really low price but give you many hours of playing.
It has humor, good quests, weapons, a big world to explore and Characters, what you want more?