I played Freelancer as well as Dark Star One and X2, but Freelancer was not enough "Battle against BIG-Spaceships and defend your own from torpedo-attacks", the same Problem that Dark Star One had. the fights were always the same: Enter a System/a mission, baddies are coming in, fly in circles an destroy them - the end.
Maybe i should give the X-series another try because I was never really able te get into it very much. It was always too much economy-stuff in my eyes.
The thing is, I would really like to see something that resembles the style of Starlancer again: Youre a Fighterpilot starting from a carrier and you have to fight against other carriers/space stations who launch fighters themselves and while not beeing able to destroy the whole thing without heavy ordnance (which is where torpedobombers come into play)you can destroy things like shieldgenerators, communication, parts of the enginge etc. and you have to guard your bombers and destroy torpedos/bombers beeing launched from enemy crafts.
Yeah, basicly i would really like to see a kind of space-figth simulator. And none of the listed games in the other posts really fulfill these criteria.