| I find the World of Darkness rules fairly simple (at least the basics - there are always complex corner cases), but again you have the problem with the usage.
Perhaps the easiest is to make up your own system? Then you can make it as simple or complex as you like.
An idea would be for it to use d6's, if you want parents and other "non-gamers" to use it, without having to go out and buy a set of dice.
You also mentioned you were worried about getting lots of Luke's, Han Solo's, etc from using the Star Wars system - but you don't have to let the players know what the system is called. If you want to change it even more, throw out/change the parts that doesn't fit and use it in a fantasy setting. | 
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