I really, really wanted to love this anime, hell I still do, but that just isn't going to happen. See you forgot that your friend telling you about Black Bullet is a huge dick and he might have forgot to mention to you that this anime also possesses all of SAO's worst qualities. The pacing is awful, the story predictable, the power-ups stupefying, the dialogue mind-bendingly atrocious, and the characters shallow. You will be surprised to see that even after that rant I still award Black Bullet a somewhat respectable 7/10, to be honest I am surprised as well. I think that was just the last remnants of me that want to like the anime. With this farce of an intro, I believe it's time that I break down the individual areas.
Story: 3/10
There isn't much to be said here. I will admit that the first arc is actually quite good and up to its conclusion I had high hopes for this anime. Then the rest of the anime happened. I almost feel like the staff poured themselves into that first arc and then just didn't have anything left to try and make the rest of the story as well. The pacing gets really wonky in the last half. Sometimes things happen/ people die and I'm pretty sure that the moment is supposed to have some profound emotional impact, but since we just met the characters it barely even registers as a bump in the road. I also feel like "story" is an adequate place for me to bitch about the dialogue. Whomever wrote the script needs to be drawn and quartered for cruel and unusual treatment because that dialogue was butchered. If you are watching an anime and are able to guess the next line with greater than 25% accuracy than something is wrong. It was just a wholly uninspired and dull work.
Art and Sound: 9/10 and 8/10
The art was really pretty and the soundtrack never bothered me. I also liked the OP a bit. The action scenes were executed pretty well also. Both of these categories get thumbs up from me.
Character: 5/10
Oh let me introduce you to our star-studded cast! We have Cookie Cutter Protagonist"-chan, "Tsundere Loli"-chan, "Drinking-that-Lean-Dere Loli"-chan, "Mysterious Mask"-chan, and last but certainly not least "Oppai with a Dark Past"-chan. These are literally the only characters you will see enough to even remotely care about and all of them have the most static, boring characteristics-- well with the exception of one and we only learn about that twist near the end from "Shy Furry Loli"-chan at the end of her thirty seconds of screen time. Which raises another issue of how characters were never allowed much if any screen time if they weren't a main. That would have been ok if it wasn't for the fact that the creators clearly wanted us to care about these transient characters' demises.
Enjoyment: 7/10
Ehhhhhh, I guess at the end of the day I did enjoy this anime. At the very least I wanted to enjoy this anime. When it began I thought this anime might be like a 9, but that was most assuredly not meant to be. I tried to dive into this anime, but it ended up just being a shallow stream. No amount of action and lolis was going to be able to turn around my opinion of this anime... Or can it ?? I change my mind! 15/10 best anime evar cause all meh lolis! Bullet Black for President of the universe.
