From sci-fi what planet would you like to vacation upon?
So many places.
I would like to visit Trantor, of course, tha capital of a society that spans over 25 million worlds. I am sure as hell that the museums are great.
Gaia from John Varley’s novels. She/it is the funniest omnipotent being ever.
Trantor at its height.
The “Earth” of the Atevi (C. J. Cherryh).
The Ringworld’s not a planet so I won’t put that one down.
Magrathea
Vulcan
and … what the heck. Risa.
Or Risa’s 1960s equivalent, Wrigley’s Pleasure Planet.
I understand they have all the same stuff as Risa, but nobody needs condoms because AIDS hasn’t been invented yet.
They have a rule about smoking, though, so after sex all you can do is chew gum.
Then I’ll spend some time on the Shore Leave Planet.
Eroticon VI (http://en.wikipedia.org/wiki/Magrathea#Eroticon_VI)
Omicron Delta (http://en.wikipedia.org/wiki/Shore_Leave)
Rubicon III (http://en.wikipedia.org/wiki/Justice_(Star_Trek))
BTW: How come, in the Childe Cycle (http://en.wikipedia.org/wiki/Childe_Cycle), Gordon R. Dickson thought up groups of human colonized planets with “splinter cultures,” specializing in war/courage (the Dorsai), philosophy (the Exotics), faith/fanaticism (the Friendlies) – but none specializing in art, music and pleasure? He could have called them “the Hedonics” – Babylon, Sodom, Gomorrah, Paris, Vegas, Montecarlo, Funkytown, and the planet Rock ‘n’ Roll High School.
Tralfamadore.
Just me and Billy Pilgrim in a dome. With a gajillion Tralfamadoreans peeking around the corner.
Pre-crisis Krypton (as long as I had some kind of device to keep the gravity from crushing me)
I’m not sure if it counts as another planet, but I’d like to see The Gemworld
Although I’m not sure if a visit would be that interesting, seeing the Puppeteer planet (Niven’s Ringworld) and the associated worlds/suns moving through space would be awesome.
I’d go to Lando Calrissian’s world of Exotic Massage, as presented on Mad TV
When I thought this was about a real planet I thought “Mars”, as it’s fiction I’ll take Kim Stanley Robinson’s Blue Mars
Barsoom.
Andor.
Cait.
New Hong Kong (if only to visit the Velvet Fist).
The Bazaar on Deva.
Omicron Ceti III. Snort some spores and let the good times roll!!
It always struck me as odd that those spores were never studied or tested on terminal patients. Imagine perfect health, organs regenerated and general euphoria and all it takes to snap you out of it is a good brawl.
Trantor is a good choice. I’d also like to visit Arrakis.
The Planet Claire! 
I want to visit the Sorority Girls from Planet Playtex.
Failing that, Bradbury’s Mars.
Or maybe Barsoom.
Or Jinx.
Or Athshe.
Or Belzagor.
Or the World of Tiers.
… pardon me, I have to get off the computer and back to my bookshelf.
Put me down for Pern! But only after the Riders knew the Threadfall timetables. Imagine going to a Gather with Robinton and Menolly. Or meeting a dragon that’s not intent on eating you or stealing your gold and/or your wimmins.
The planet Sharon Shinn’s Samaria is located on. A planet where music is as important and integral as the air you breathe is one I want to visit.
Ford Prefect’s home planet before the Great Collapsing Hrung Disaster.
If it counts as another planet, King and Straub’s Territories.
Two choices:
Altair IV from Forbidden Planet, provided I get to play with all the cool toys. Especally the Plastic Educator. (I’m sure I could handle the shocks). All things considered, it would probably be better if I visit solo.
Planet of the Enormous Hooters from the Saturday Night Live sketch the week they had Dolly Parton as a guest. (It was originally written for Racquel Welch, but for some reason they didn’t do it then.)
Edgar Rice Burrough’s Venus.
In a related vein, I’ll take one of those custom-made Magrathea planets where five hundred naked women drop out of the sky on parachutes. 