Hard to imagine, but for my game I find its the worst thing in the world!
Everytime I have a big stack early, I blow out early because I am unable to find the 'change down gear'. If I am on a gamble mindset, then I start to believe that I am invincible. I would say that nearly all of my decent cashes have come when I have been average stack at best throughout and come up on the rails.
In fact some of the winning positions I have thrown away would be laughable to an observer.
I've been exactly the same. I always felt that when a big stack I should be bullying but I seemed to pick the wrong spots, pick up a little bit of a hand and not let go. Then get angry with losing 1/3 of my chips and screw up. Didn't suit my game.
Then I decided when big stack to slow down a bit. Ended up slowing down far too much and being susceptible to blinds when levels had gone up.
Now I seem to have found a happy medium. Have converted my last four big stack positions (top 5 well before bubble) into cashes. Play smaller pots and sniff out weakness, gradual build, smallball poker. Seems to work.