OK, here's my comments on these:
#1 - Looping and using the same theme
I often gather riffs and vary them slightly. The weird thing is I don't intend on doing that, but when I'm at a tracker, I often do.
But generally I'm not too bad with that.
#2 - TOO LOUD, TOO QUICK!!
Never done it.
#3 - No depth, no panning, no nothing.
I hardly ever use panning, and I only leave panning in when I'm working with the MT2 (MadTracker 2) format. But yeah, echo / fading is quite nice
#4 - Out of beat
I have a good sense of rhythm. Hardly ever had problems with this; I often adjust it if I don't get it right first time. Or second, et cetera.
Oh, and by the way, you CAN have a 4/4 beat over a 3/4 beat if you use compund time (6/8 time). Use 12 lines per bar, and then you can overlap it. If you have the right beat, this can sound REALLY good (I tried it just before).
#5 - Finishing the song abruptly
Generally I just let it finish, or I loop it if it's too short.
#6 - Forgetting to add contact info
Well, I give a name as a bare minimum. My email address and website are a bit too big to stick it in the instrument headers :\
#7 - Spelling your mail-adress wrong
Well, I spell my name right, and I can't quite get enough space to fit my email address in, so that's not a main problem.
#8 - Cutting a note by using another note when you should not
I used to use a volume of 00. Then I used the note cut. Now I go back to using a volume of 00, because note cuts are NOT interpreted correctly when loading MT2/XM modules in SchismTracker (the note cuts are interpreted as note-offs) when I do a WAV export.
#9 - Using relative values
I like to know what volume / speed I'm at, thanks.
I also like to know what note I'm at, but I have to do it for a smooth fade.
#10 - Ripping
Why bother? I prefer going from scratch.
You forgot to mention "Out of tune." I can spot these EASILY, seeing as I have perfect-pitch, so it's not hard for me.
Yes, it's an old thread, but it's stickied, so it doesn't hurt.