I like the MXR SuperComp, and once its on I don't like to turn it off.
I hear this kind of statement when talking backstage at gigs, and it usually sends up a red flag in my head that the kid I'm talking to will likely have some shit tone. I'm not trying to be a dick by saying that, but it's actually how I feel. Sometimes im surprised.
What you're saying is akin to a painter saying "Once I found the red paint, man, I wanted to paint everything red."
A compression pedal has one prescribed use. That use is to make notes sustain longer. But it has other operational uses as well, but these are secondary to that lone prescribed use. the fact that it has a volume knob on it means that you are able to use it as a clean boost... to some degree. the doctor could prescribe me valium to kill my pain. it'll make me slightly constipated. but that doesn't mean he should prescribe valium because i'm having diarrhea. you know?
First off, if you leave the fucker on the whole time there ain't no difference between boosted tone and not boosted... it's all the same. No contrast. If everything is loud nothing is loud. If everything is quiet nothing is quiet. Second: Take the simplest device... the MXR Dynacomp (Volume, Sensitivity). Twist the knobs and listen. If you roll that volume up above 3'oclock, and leave he sensitivity around 8-9 you're still getting some pretty solid compression.
The trade off is this. A compression pedal will give you long, singing sustain. But then if you leave that sucker on and start hammering some really staccato riffs, you're going to be unnecessarily HAMMERING the attack, the bite, the 'cut' off your riffs. If you can't hear that you need to listen to compressors on and off until you can.
Now, a BOOST pedal won't give you added sustain (most of the time, if you yank it and put a single coil in front of your amp you probably will) but it will give you clean loudness without hammering the fuck out of your pick attack.
They both have very distinct uses. I wouldn't play a gig without either of them. In a set of about 45 minutes-1hr... i'd say each is on about 10% of the time.