The title says it all.
For me, it's what might be my favorite sci-fi movie of all time (aside from maybe The Empire Strikes Back): Star Trek II: The Wrath of Khan. Why? It has all the cool elements. Grit? Check. Interesting technology? Check. Unique and tense starship battles? Check. Space stations and underground bases? Check. Finally, Elite-style colored wireframe graphics for the computers? Check. What's not to like?