I'm not an animator, but let me just say that I share the same sentiments about Newgrounds. This site and this site alone is what got me where I am today. It turned me from a 12-year-old under-performing Runescape addict with a dream into a 19-year-old avid musician with an established fanbase and an enormous circle of contacts/friends who range from musicians to animators to voice actors to artists to writers to programmers to singers.
I have no site to thank except Newgrounds for that. I don't think Newgrounds should be more popular than it is now because it's unfair that NG beat the Internet to everything and still isn't the next YouTube, but I think it should be more well-known because it has what a lot of other sites like YouTube don't have; a functioning community.
I don't know of anywhere else which groups different content producers together so effectively. Somewhere else if I wanted to find voice actors, animators, artists, programmers and musicians for a project, I'd need to visit a crapload of different sites only to find a bunch of uncreative freelancers who make stock content. On here creativity is encouraged and everyone is within an arm's reach, or to put it less metaphorically, a forum post away.
I actually got a taste of popularity on YouTube. One of my music tracks was used in a top-selling mobile game and now I'm getting an average of 8 new subscribers a day and hundreds of thousands of views. It feels great, but also meaningless. On here, if I got even an eighth of that popularity I'd be getting meaningful reviews with constructive feedback, my music used in games and movies and messages from content producers in other sections of the site creating more opportunities.
So yeah, point is, I have a crapload of respect for Newgrounds, and I hope it continues to prosper!