I use mine for an interplanetary staging point. I dock a big booster + lander/probes and fuel up then take off for other worlds. Lemme tell ya, it was a pain getting 20+ tons of fuel up there and docked.
ASAS: dundundundundundun... ME: What are you...ah, forget it. ASAS: dundundundundundun.... ME: *launches rocket* ASAS: FLASH!! AHHAHHHHHHH! ME: Oh, god.... ASAS: dundundundundundundun.... ME: Just...shut up and steer! ASAS: FLASH!! AHHAHHHHHH!! SAVIOUR OF THE UNIVERSE! *rocket explodes*