A slow, steady approach gets the power and pedal in early (no surprises at the bottom) and gives you ample time to see and miss obstacles.
A fast approach with a flare at the bottom gives you more potential in the event of engine failure or power loss.
If I was approaching to a big flat area that I knew was clear, I'd fly something close to a power-terminated auto profile, so if the donk failed I could just continue doing what I was doing.
However, this is the exception rather than the rule for most pads you go into, so the steady controlled approach is usually the go in my experience.