Different compounds that get you stoned , get activated at different temps. If you are only using 375, then you are missing out aspects of your high that would get activated at 350, 360, 400, etc....you get the point. You're only getting the stuff that gets activated at 375 and missing out on all the other great stuff. Kind wasteful, huh?
I start at 350 to get the compounds that create a cerebral floaty clear head high. Then start increasing in increments to get the usual "stoned" feeling from the 350-400 range. Then finish around 400-420 to get the heavy sedating couchlock high. If you run it through the whole range like this, you get a full range high.