Flash portal -
I don't know what people think when they upload a flash. If it's crapy then why even bother? Most people look upon a new flash submission and judge it by a few things. Some, if not most or all, people don't even view the creator's work when they vote. A few things they look for are:
1. The name of the author - if it's a well known name then 5, duh?
2. File size - this is probably the biggest pointer on whether the author is serious about the flash and the effort put into it. Of course sometimes the file can be really small but lots of effort put into it, or the flash is a link to another flash so that the file size would show up as really small (e.g. 0.3kb) while the real thing is much larger.
3. The author's comment - if it's stupid and pointless then 0. Don't put in things like "this is my first submission/flash..." or "I made this a while back and it's pretty old and lame...". Also, try not to personalise it, e.g. "I made this with my friend/brother..." or"he told me to upload it, even though I think it suxs...".
4. Type of submission - if it's a game then it would most likely to have a longer lifetime in the new submission section. People mostly look at the movies and not the games because games take up a lot of time and are intellectually demanding.

Audio portal -
Now, I have no idea about the audio portal, as no one really visits it and nothing gets blammed. One thing I really hate though is the "0-bombers". I mean, seriously, these artist put serious thought into the music. if you want to see your voting power at work and decreasing the artist's work's score rating by -2.99 or w/e then I suggest you eff right off.