Drums are hard to get right.
Say you're in a channel where a distorted electic guitar is running at -12dB (with next to no dynamic range). You want your general levels to be just around the same. But when you crack down on the snare, you can be +18dB or more above a gentle hit, quite easily... Equally, the difference between the toms and crashes can be pretty large. Drums have an enormous dynamic range and getting the balance between being heard and clipping is a struggle.
(Actually, you'll often find the guitar is at 0dB, barely avoiding clipping...)
(Oh, and isn't this thread in the wrong forum?
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