I'm not sure if space simulator with "RPG" elements count, but if yes - you should definitely play Freelancer + Discovery mod(Adds shitloads of ships, star systems and equipment.).
One of the things I really enjoyed in it was exploring another star systems(You wouldn't find the same looking one, and some of those are really beautiful), finding hidden bases and travelling thru meteorite fields and other similiar things. Also - space trading and general Freelancer lore is awesome!
But well, it's way different than Starflight. Still - you might like it. I've seen person who loved it and he was totally not into sci-fi stuff.
http://en.wikipedia.org/wiki/Freelancer_(video_game)
[youtube]http://www.youtube.com/watch?v=h8x_2y9ABr8[/youtube]