Don't let them get to you... Some of them can be FUCKERS! I have experienced it first hand.
About your Mudvayne cover... I agree with everyone that the guitars need to be beefed up a bit. Go back through the mix and add some extra mids and cut the highs a bit. That should do the trick nicely. If they come out sounding weak, boost the bass a little.
As for the drums, I'm not really sure what you used but they sound pretty good. I don't use "real" drums, myself (setting up the mics is a pain in the ass). I usually use drum pads or if I need some other sounds, I'll use my keyboard... Anyway, the drums sound great.
And, as for your 'trance' music... I have heard better... But I've also heard a lot worse.
All in all, good shit. Keep it up!