I know what you mean fellas. Not all tracks work that great with a side chain setup, especially ones with a real bass guitar or some other bassline with lots of upper harmonics. People also set thier gain reduction way too high, but sometimes I really like that heavily syncopated pumping effect on basslines where the compressor has a high release time creating holes in the bass responce at roughly every 3/4 beat as opposed to one big long drone of bass. It adds movement to the low end IMO. Ben Sims - Theory is a good example of what I'm on about.