Where are the problem zones of this mix?

The Drums mainly...

Guitars sound a little muffled, but they're generally fine..

Drums though - Overheads too loud, kick lacks attack and is too boxy, snare should be louder and have more body. Toms actually sound really good though...

Rest sounds good though
 
First of all, thanks for your feedback!
That already helps a lot. I decided to put aside preprocessed samples on this mix but I start to regret...
I'll either have to work a lot on these or should go back to the preprocessed ones.