Black Magic M-66 is the sort of action OVA I wish all action OVAs could be - an all killer, no filler romp through a cyberpunk dystopia. It's got a lovable main character, a phenomenal art style, stunning animation, and nearly non-stop action. Sure, it may be light on story - but that's not really the point of Black Magic M-66. It came to give thrills, and as far as I'm concerned, it's a roaring success.
Also, there's an important distinction to be made between story and character. The story, the actual plot of how everyone gets from point A to point B is weak, but I must reiterate - the protagonist, Sybel, has an unbelievably strong character. She steals every scene she's in with trademark Shirow tomboy spunk and snappy dialogue, letting her bounce off the rest of the cast with ease. Seriously, she's on a fast track to being one of my favorite sci-fi anime protagonists.
Oh, and it has androids vs military action. You really can't go wrong with that.