I was a huge fan of space sims as a kid, with the Wing Commander and Freespace series being one of my favorite series of all time, and StarLancer has a special place in my heart as well.
I think it's the mechanical design that stole my heart, seeing as my hobby as a kid (other than games, duh) was reading about military equipment. The in-game factions' ships all had a distinct vibe to them, and I loved how they recycled some real-life fighter names like Mirage or Tempest.
It was also refreshing to play a space sim which emulated a real-life East vs West human vs human conflict. Overall, for 17-year-old me it struck me as a mature game, and quite unlke any other of the genre, and I can't wait to play it again sometime.