Before I got my suspension setup my headlights would point too high with me on the bike, the suspension would come close to bottoming out on bumps, the front would dive when I got on the brakes, the rear would squat under acceleration while the front end would go light making the bike prone to headshake and the bike just generally felt a bit unstable in the corners.
Got it setup by a local suspension guru and the difference is night and day. Now it's much more stable in the turns and under hard braking/acceleration. It's not perfect, I'd greatly benefit from a new set of springs better suited for my weight but it's far more acceptable now.