Well then, SwG is extremely complicated haha.
The player runs the whole galaxy when it comes down to it. The economy is supported by the player, the success of either rebels or imperials depends on the player, entertainment depends on the player. It's really such an in-depth game.
You have craftsman who can make you weapons, but within those weapons you can determine the decay rate, the strength, range, etc.
You have chef's who create food, and depending on the resources used, will affect you differently, in positive in negative ways.
Seriously, I don't know how far I can describe it. It really is your own universe. You are free to do whatever you want. You can become mayor of a city, or an assassin. People can post bounties on certain individuals, real people in game, and you have to hunt them down, if you are a bounty hunter, and you recieve money for succeeding. It really is the best game out there, depth wise.
Seeing as you never experienced the older SwG you may enjoy the NGE SwG (New Game Enhancements) the stage that it is currently in.
Or if you'd like to try out the free SwGEmu version, I can direct you to this site:
http://www.swgemu.com