This assumes I have no sword-fighting skills now, though - not an accurate assumption at all.
Still, the Culture it is.
I’d like to live on TRANTOR, as the galactic empire decays…kowtowing the MULE would be kinda fun. I’d also like to live in an advanced technological civilization (PCs, internet, cures for cancer, etc.) but where people dress like its 1925! 
Yeah, I figured at least there would have to be some votes for The Porn Universe…
It’s not a whole fictional universe exactly, but a fictional place with enough fantastic elements (bears who are also men, dreams that switch owners and frozen Napoleons and the like) that I’ll count it as one. I would love to be the town librarian for Cicely, Alaska.
Otherwise, I think Billy Pilgrim’s universe in Slaughterhouse 5 would be interesting, sometimes being a teenager again and other times being held as a pampered specimen on another planet.
Not Firefly, not *Sabriel, not Middle-Earth, not The Dark is Rising, and not Buffy, even if the vampires seem hilariously inept. Narnia during the reign of High King Peter or Prince Caspian the Seafarer, Perelandra, or the world of Sunshine, so I can plunk myself down at Charlie’s Coffeehouse and demand a baker’s apprenticeship. I want to learn how to make The Death of Marat and Bitter Chocolate Death and Buttermost Limit. I’d still have to dodge vampires, but that would be okay.
If not Sunshine, then Spindle’s End.
Nice 
The Land from the Chronicles of Thomas Covenant, before everything started going haywire. Say what you will (and I’ve said my share in the past) one thing that man accomplished in the first series was creating a world that I absolutely fell in love with and would love to be able to see.
Rivendell - It’s freakin’ beautiful. Waking up every morning in a place like this would put me in a great mood. It’d be a good way to start every day. I’ve also always wanted to learn archery. Who better to teach me?
I would have said the shire but I don’t much like to drink. I do enjoy to eat though. The shire is a close second.
I’d got with Star Trek, TNG-era.
Sure, I don’t know how any of those cool gadgets work right NOW, but a few years of studying and I’d be all set. After all, the ST verse has a noticeable lack of pirate ships.
I’d like to spend a few weeks in The Hoop with Halo and Rodice, then visit the Exit Gardens.
Join us in Bree if the Elves don’t accept you. Us big folks are not allowed to live in the Shire. We can visit from Bree. Nicely located on a major cross road also.
Jim
DCU.
With my real-world comics knowledge, I could set myself up as a competitor/supplement to the Calculator and get rich.
Invest/squirrel away my money in half a dozen countries from the US to Qurac.
Use the money to build connections and dig up money so I can maintain my edge.
Supervillainy…that’s the way to go, for sure.
Information…dig up information…
Star Trek TNG for the holodecks and utopian society.
or Greg Egan’s Diaspora - choice of modified human, sentient robot, or sentient Ai in a vast VR, which ability to switch between all three.
Same here, for exactly the same reason. Unfortunately for you, Mr. Tengu, I cannot abide competition.
Henchmen! Dispose of this… pretender.
Aaah, but I’ve gotten here first. It’s all about the network in the supervillain info-broker game, and I’ve had time to develop (OK…steal) one.
You don’t think I could usurp the Calculator only to be taken out by an upstart, do you? Just the kind of short-sightedness you can’t have in this business.
Why don’t you try the Marvel universe? I hear the Answer’s off his game lately, you might be able to take him down.
The Answer?!
Oh, no… he… di-iii–idn’t.
Vous savez, naturellement, que ceci signifie guerre!
I think I said the same thing in some other thread, but I’d still want to go with the Futurama-verse. All kinds of improved technology, the ability to travel around the universe, and a level of absurdity that I’d be comfortable with.
Of course, Amy Wong would also be there. That’s only a minor consideration, really, I swear.
Hmmm… I’m tempted to say Anhk-Morpork, but life for most part it’s citizens tend to lead a crappy life. The Star Trek universe probably wouldn’t be bad, but I’m not a big fan of watching it, so living in it might be a bit boring.
Hmmm… my life in this universe isn’t all that bad. And the Marvel one would be somewhat similar, since I wouldn’t have super powers. And it would have the added benefit that instead of being a regular scientist I could become a mad scientist, and, like, become the bane of the free world or something.
Of course it might also be cool to live in The Matrix, particularly if you could be a double agent who gets rewarded by The Agents by being allowed to right his own lifecode from time to time.
Not that I’d do that of course.