Breakbeat =
http://www.youtube.com/watch?v=qk-FFrfE0kk
Breakcore =
http://www.youtube.com/watch?v=j0wj76YObNI and
http://www.youtube.com/watch?v=eNfXotaFnjo
As you can see Breakbeat doesn't have the heavy distortion in the break/percussion and is usually slower.
I would call this
http://www.youtube.com/watch?v=NBDAunPkSAY breakbeat too.
As for your song. as far as automation goes you got that pretty well. And twit could write in 5/4 or 7/8 and nobody would notice.
When you get into weird signature you'll notice that people, since they can't "bob their head to it without looking like they are having a seizure". They won't even pay attention to the time signature.
Unless you are writing something like DM Azhura's Seven...You don't have a choice there.
My only problem with the song is that it didn't go anywhere, it didn't have something to look forward to.
I would work on that, or, if you want to stick with the just drums thing, I would layer them.
Like...check out that aphex video I posted up there, his drums are layered like crazy, it really adds all of the frequencies you need to make the song sound full.