Although I would love to ride in Dahak, Consider you just took our Moon for a joyride!

In the Harrington Universe, Any of the newer Grayson ships.

My Ideal spaceship though would combine several items:

General Products #4 Hull (look it up!)
A ramped up Jake’s Time Space twister from Number of the Beast
A loyal Computer Core Programmed and designed by Dahak II
Weapons? Don’t Really need them. Imagine Jake’s machine taking divots out of an opposing ship
or replacing that same divot with the corona of nearby star!

Any help.

But my first choice is a love from an earlier time: I’d take a bunk anyday on the Solar Queen from Andre Norton’s space trader series.

Already mentioned, but another for Haviland Tuf’s Ark.

Any of the planoforming ships from Cordwainer Smith’s Instrumentality of Man universe.

For myself, other than Ark- hm.

Dahak from David Weber’s Empire from the Ashes universe would be good – not so luxurious as to remove you from the reality of being on a spaceship, but big/powerful enough to take you anywhere and give you a great chance of surviving it.

The Pride of Chanur from C.J. Cherryh’s Chanur series – mostly because it is (originally) one of my favorite examples of a ‘working’ starship, a freighter trying to make do – and because it would let me meet the Hani and Mahendo’sat (is that cheating?)  ECS5 Norway from the associated Company Wars universe for sheer human badassery.

Though Zindell’s Lightships and Reynold’s Nostalgia for Infinity are high up on my list as well!

A second favorite would be the Death Star, but only if used for space piracy. One could point the main dish at the nearest planet and demand all their valuables. A titanic skull-and-crossbones painted across the immense surface of the moon-sized battelstation would be an attractive fashion statement.

But I see no love for the classics, the oldest, the first: yes, I mean the Cavorite sphere built by Cavor by which he wafts to the moon. The Sphere is made of an entirely fictional (read: impossible) gravity-opaque metal, and navigates merely by turning the slats of a Venetian blind arrangments of the metal parallel or perpendicular to the gravitating body in question.  

It is, I admit, mildly awkward (sort of like being in a falling elevator the whole way there, with all your gear, lunch-hampers, diving suits, oxygen bottles, bottles of rum and humidors of cigars, etc.) but there is absolutely no need for fuel: you merely shut off Earthly gravity, and allow the gravity of your target to pull you along. HG Wells supposes that one would suffer eerie almost mystical sensations of detachment from time, and lose the need to sleep, in null-gee, which means the adventures described take place in another universe with slightly different laws of biochemistry and psychology, or that he was not as accurate in his scientific predictions as Jules Verne.

Althought Mr. Wells never did the calculations for an interstellar voyage, since the pull of gravity would act continuously, and therefore the acceleration would be continuous, if the Cavorite Sphere blocked all solar system gravity and merely allow Proxima Centauri to draw it, how long would it take before one would reach relativistic velocity?

Off one would float, all without di-lithium crystals, antimatter, unobtainium, ion propulsion, or even a launching laser back on home base blazing away. Consider of the advantages of a sphere of Cavorite! Not comfortable, but think of the economy!

I’d enjoy a ride through folded space in a Spacing Guild highliner from Dune.