Alright, so from what I have heard from you I think your voice is extremley ranged and unique. You can make some hilarious style voices, different from most. I have judged over 6 voice acting contests and have heard a lot, and i mean a lot, of voices. Yours is a great one for an exagerated style character, common in your humor and dubs, which I love. Your spider dubs are great and clever, even if they do usually resort to cock jokes, and really we all do that... so you should fit right in with Newgrounds.
I find your range appealing, but chaotic. You seem to randomly assign a strange pitched voice to a character. Thats fine for practice, but its always good to get together a set list of voices for the future. It makes things a lot easier to carry out. For example, whenever someone wants me to voice an evil kind of guy, I've got this evil scientist voice I use. whenever someone wants me to voice a kid, I play as a dumb, socially awkward teenager with a boring and confused, high on pot, attitude. When you practice on these individual voices, you will start to get better at them and master their styles.
In other words, I love your voice and I love your style, but you should focus those styles into a set, organized list. Most voice actors only do a handfulll of voices and use them for the rest of their career. Look at Futurama. Those guys have been doing it... for a long time, and continue to use those voices throughout different series. On Newgrounds, this is very, very easy to do and your voice will be noticed for it.
Grab yourself a pop filter dog. You have the talent. Now you just need the passion. Life can get in the way and cause crazy shit to happen with your mood. Don't let that happen. Just keep focusing on your talents and you will get somewhere for sure. I was depressed for a long time, and still am actually but much better, while doing everything on Newgrounds. Thats actually why I started focusing my talents into expressive music. Even then, I still continued my voice acting and made some cooool stuff. You have made more than I have actually and im impressed with your dedication.
Keep up the good work man.