Flying is for droids. This was established by a Jedi Master in the prequels. ;)

You forgot a ten year old boy's claim at being a pilot for "all my life". ;)

Ships in SW are like cars today, everyone has one (although it could be argued that people today don't know how to drive, hence all these wonderful new "safety" features that promote texting while driving). That's why Luke exclaimed they could buy their own ship over Solo's 10K demand for passage...ships are cheap in the SW-verse for a reason.

I thought the cases he was loading was the "more reward than you can imagine" 

Which then begs the question "Who's funding this rebellion?"

But it was a Kiddie movie and you were not supposed to think about it to seriously.

Curious how did they handle money in the WEG RPG?

Ben was a hermit for the past two decades so it's not likely he'd have much in the way of currency. Hence the line about selling the speeder to cover that initial 2K and what was supposed to be a promise for Rebel contacts picking up the balance at Alderaan. 

Obi-Wan was a former Wall Street specialist: he makes awesome deals with other people's money. 

Back to the original question, I generally go with there isn't one. Each group has their own playing style and way of doing things. So each has to determine what they like. Here's my break down:

The Rules: This should not have been first but we'll go with it. In many of today's games there are multiple versions and editions of the same game and each has its fans. The only real difference is complexity. Some RPGs are one page, others have multiple Dungeon Master and Player Rulebooks with more manuals dedicated to monsters. Every one should pick thewhat they are comfortable with.

The Setting: This should have been first, you can't pick rules if you don't know what type of game you are going to play. There are so many settings it can be hard to choose but as a guide the vast majority of Fantasy settings are Tolkien. So differences but not many. Sci Fi has alot more variety but tend to stick with Humans in Space. Post Apoc is all about the mutants. The many others stick with one theme; Western, Cthulthu, Spy, Military, Cute Animals, Super Heroes etc. Like going to a movie multiplex pick what you want and entertain yourself.

I say the perfect campaign is the one where the Referee and Players spend the first night with no characters or rules and just sit down and figure out what story they want to tell and how they want to tell it. From there they can go forward having reached a concensus on what and how they wish to play.

Well Referee's who like to control things will set the setting ahead of time. The fun part of SF is that the universe it is set in lends itself to many different settings. Showing up to run the SF0 adventure and finding out that your players all thought they were going to be PGC Troubleshooters looking for Sathar agents is not a good way to start. One has the setting of a wild planet of exploration with no outside help while the other involves many interactions with NPCs on a civilized world with more investigating roleplaying and less shoot it its moving.

Looking at the SF modules they had a pretty good span of different settings while Fantasy games are usually dungeon crawls where clearing an underground lair is most of it and after alot of player advancement do things above ground take place.

Seriously though, every version of D&D has a defined setting. Moldvay/Cook B/X and Mentzer BECMI are both set in Karameikos, although Mentzer's set expands and better defines Karameikos (either Companion or Master offers a full world map but does little to flesh out much beyond Karameikos). The earlier Holmes set (which is merely a rules-light version of AD&D) and AD&D are set in Greyhawk. Other editions of D&D use Mystera (sp?).

Going with B/X (and Mentzer) the modules are a nice spread as well. Most of the B-series are dungeon crawls while the X-series are above ground. B3 & B6 being exceptions while X1 & X2 do have underground portions but the bulk of them are overland or structure based scenarios --- there may be others, I only have B1-6 and X1-2 but from what I've gleaned of B9 & B10 at least half of each are above ground adventure.

The same can be said of other RPGs...Traveller and Top Secret have specific settings, with Traveller being so well defined that the GM really has little room for ad-libbing. SF simply establishes who the good guys are and who the bad guys are, and aside from a handful of defined worlds most of it is open to referee discretion and/or interpretation. As such each and every one of us here has their own unique setting that involves the 24 named but not necessarily defined worlds of AD/KH (actually 23, IIRC none of the boxed sets or modules divulged the K'tsa-Kar world) or however many there are in Zeb's if you go that route.

Dungeons and Dragons have pretty much the same setting. Humans, Elves, Dwarves and Hobbits in a medievil world where magic is used. Eberron went a little into steampunk but the others were only changes in name.

Top Secret was Cold War spying and not much difference could be added.

Traveller like SF had huge variety of settings. So much so that they liscensed some out to other companies like Judge's Guild and FASA. Yes they were all out in space but some were in the Imperium while others were outside of it. Some were low tech and others very high tech most mid tech. Some were crew of a starship some you didn't even worry about starship travel. Safari missions, spy missions, combat missions, trading missions kidnapping missions and on and on all taking place on different worlds with vastly different societies and environments. SF has alot of that just more limited by the fewer number of worlds in the Frontier.