Welcome to a-m-v.org! You seem to have a good attitude to get started, so I'll give all your AMVs a quick run-through. Since there is 5 of them, I may be a little less detailed than I normally would be.
+++++
Bang Bang Bang
Some video interlacing, blocking and banding. which made it hard to watch this one quality-wise. I really don't like Black Lagoon, so I'm not the best person to review this as an action video. XD But I think you did a pretty nice job with the scene selection, but felt like it could have used a little more editing here and there to match the fast pace of the song. Plus, the ending was really abrupt. 3/5
Happy Shiyatastic Birthday
Ha! Cute. :3 You did a nice capturing the cute manner of the song. THat being said, I think your "literal" sync bits hurt you . Such as putting up a picture of the Nazis on the word "clan", when you had previously been on a picture of N. Also, some of the anime you chose didn't fit as well. The ones that really stood out was Hellsing, because its Darker coloring/themes didn't really mesh with the other anime. I think that some of the hard cuts between VERY different types of scenes [like at 1:07] might have used a transition such as a fade/mask. LIp sync could have used a little more work/fine tuning.
BUT, when you did do the parts with Nichjiou, K-ON and similar ones, it was really cute and captured the song well. Nicely done.

3.5/5
Is Love Alive
Yay! A romance AMV. It's my favorite genre and the one that I edit most with.
I loved this. You did a nice job with the black fades (which as anyone here will vouch for me in saying that is a huge compliment, because I HATE black fades), and you NAILED the song with its lyric sync and mood sync. Really, the only things I have negativly to say about this one is that some scenes ran a little song and some of the hard cuts might have looked better with fades. Bakemongari also had a different frame size than the rest.
I LURVED the ending by the way. It's like we got the answer to the question that the song had been asking for the last few minutes.
ANYWAY, nicely done. I'm keeping this one for my collection, and I can recommend this one to others easily.
4/5
Burn It Out
Overall, I think you hit the mood of the song nicely, especially during the slower parts. I'm a huge Madoka fan, so I naturally love a lot of their stuff.
Lip flap was here and there. This is where a character's mouth is talking but not being lip synced. Kind of took away from the AMV at a few key points (the opening for one).
I felt like you could have synced this one a bit more. You picked out some really nice scenes, and I liked how all of this started out with the headphones and followed through with it, BUT I wish it'd been a little more in touch with the music. See how you synced :51 with that effect? I wish that kind of sync had been prevalent during the musical parts of it, but with hard cuts/zooms/pans in tune with the drums and all the electronic noise as well. Maybe not ALL of it, but at least during the high paced parts.
3.5/5
Look What You've Done
Lip flap here and there that I think could have been removed.
The big issue I had a problem with was the conceptual timing of the AMV. You move from Hoeinheim leaving to them trying to ressurect their mother right away. I think you could have completely cut out Hoeinheim and started with the scenes of their mother collapsing/passing, and it would have given that scene a little more impact.
I feel like the AMV lacked focus towards the end. The first part was focusing on the stupidity of the characters using alchemy to do terrible things (for both good and bad reasons), but the latter part was just the death scenes and winry getting pissed. The scene at 2:03 was also ridiculously out of place, as well as the one at 2:11. HAd you kept with the concept of that, I probably would have loved this considerably more.
But, overall, you hit the mood of the song nicely enough.
3/5
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Keep it up! For an editor that's only been editing for a month, you've got some nice editing. If you ever need someone to beta test your work, don't hesitate to pm me.