I find I tend to do it when I'm messing around with my desktop modeller. I guess it's making up for the lower volume/less dynamics that I get from it. Once I go back to my usual setup then I dial it back as it gets uncomfortable for me to listen to too much gain. Although, due to the stuff we're currently rehearsing I have a BMF Aries Big Muff clone set fairly gainy to give me a 'keyboard' sustain tone for the 80's synthy stuff!